Mixtures in Chemistry Made Easy

追加: 2026-05-12

[00:00:00]foreign.

[00:00:01][music] [music] [music and singing] [music] >> [music] [music] >> Welcome back to Pure Science Academy channel. Um, this evening I'm going to talk about mixtures in chemistry made easy. mixtures in chemistry. When we mix when we talk about mixtures, mixtures is simply the physical combination of two two or more substance which are not chemically born together.

[00:01:04]Please note that word chemical not chemically born together. They are just physically combined. This a physical combination. We are going to talk about two main types when we talk about mixtures in chemistry. depending on whatever level you are. There are two main types and the two main types are homogeneous mixtures and heterogeneous mixtures.

[00:01:29]That's going to be our main topic for today and we are at the end of this u lesson you should be able to um boldly and confidently explain or differentiate between homogeneous mischief and heterogeneous mistress.

[00:01:47]um for better understanding um we are I'm going to get back to the to I'm going to get back to this slide but for better understanding I want to I wanted I want us to demonstrate this um from home you can even demonstrate this um subject of mischief from home and um I want us to briefly um I believe in practicality science is practical it's not theoretical. So I believe um when you have a hands on experience that boost your morale and that boost your experience and um I want us to do something real quick demonstrate something real quick from the house that um I get it. So let's get back to the lab. This is a something I found in my house that I want to demonstrate that.

[00:02:41]So we have have some water here that I'm going to pour in this. I have two glasses um not in the lab so I don't have um um proper um cylinder uh cylinders to use but then I'm just using my glass two glasses that I have in the house. I have my cooking oil. I have my table salt. So I'm going to demonstrate between homogeneous mixtures and heterogeneous mixtures. Okay. So I'm going to pour some water here.

[00:03:15]Okay. And I'm going to pour the rest of the water here. About the same level.

[00:03:21]Okay. About same level. All right.

[00:03:26]So, I'm using only one bottle of water.

[00:03:31]And the left side is going to be my homogeneous mixture. So, I'm going to pour a table salt. All right. Into one of them. Into the left one. Okay. And I'll pour oil, cooking oil. Okay. Into the other one. Okay. On the right, on my right, depending on how you are looking at it.

[00:03:58]Okay. So now I give it some few seconds.

[00:04:06]Okay. I give it a try to shake it together.

[00:04:12]I can to Try to shake it together. All right.

[00:04:16]Okay.

[00:04:18]So, as we can see, what can we tell about? Do you see any difference between the solutions, Kevin, between uh this one that I've holded up?

[00:04:29]>> Yeah.

[00:04:30]>> Do you see any difference like is there any separation between the two solutions?

[00:04:35]>> No.

[00:04:36]>> Yeah. So, as he said, no. So, there this means that this is uniform. This is the salt in the water. So he said event I think he eventually said uh no eventually because it was settling out.

[00:04:49]Now you can see you don't see any difference. You can't even tell until you taste it. You cannot even tell whether it's just water or whether there's salt in there. So this is a a homogeneous mixture. Okay. This is a homogeneous mixture where we have a uniform um solution. Then when you look at if you look at this do you see any separation Kevin?

[00:05:15]>> Yeah.

[00:05:15]>> Yeah. So you can see there are two phase separation in this solution. So we have the oil set on top with the water down.

[00:05:25]So we see a yellow and a white or colorless however you want to put it.

[00:05:32]Okay. So this is heterogeneous. So heterogeneous is not uniform. So there's two phase separation where for homogeneous mixtures there are no they are uniform throughout the solution. You unless you taste it you cannot even know the other solution because it dissolves completely. Okay. So let's go back to our slide.

[00:05:53]Let's go back to our slide.

[00:05:56]Okay. So we go back to our slide after this um demonstration.

[00:06:03]They're going back to our slide. So as we said homogeneous mixtures are uniform solution throughout as we just demonstrated. Okay. And um example is salt and water as we just demonstrated.

[00:06:17]Uh sugar solution air and then heterogeneous mixtures as we saw we saw they are not uniform throughout the solution. There's a two-phase separation. An example is sun and water.

[00:06:30]If you don't want to use cooking oil, if cooking oil become expensive and you don't want to use that, you can just step out of your backyard and grab some sand and put in water and you should see a two-phase separation. And that's heterogeneous mixtures. Okay. And another example you can try in your house is salad. Okay. So you have salad, you have the lettuce, you have tomatoes, you have onion. depending on what you want to put in. When you mix with the um salad cream, you will still see the physical or individual um separation.

[00:07:02]So, key things I want you to take home uh tips I want you to know about mixture is that it's a physical combination.

[00:07:10]Okay? It's a physical combination is not chemically bond. What that means is that we can physically separate the individual component at the end of the day. So we can physically take uh separate the individual component. For example the salting water if you want to separate them we can do we can example of the physical means we can do that is through filtration evaporation distillation or decantation. Okay. So uh these are basic things you got to know about mixtures. Um and I know it's time um um the semester is going getting closer to the end and I want us to try our hands on some quiz multiple multiple choice questions that you might probably find it or see it in your exams coming.

[00:08:05][clears throat] Um and I wanted to give oursel like 20 seconds for each question to think about. I want every I want us to think about for like 20 seconds for each question. I have about 10 of them real quick.

[00:08:20]Um so you'll get ready for that in the um as you can see the first question is asking us what is mixture or what is a mixture. So a says um soama is on we have 20 seconds to answer this question. So as I'm talking think about it. So a chemical number one A is what?

[00:08:44]A chemical B between substances. B is a physical combination of substances. A is a pure substance. A D is a compound only.

[00:08:57]All right. So our time is up. Our our 20 seconds is up. So the answer the correct answer is a physical combination of substances. So as I said earlier on mixtures are physical combination of substances. A mixture is not one thing to note is not a chemically bond combination. It's a physical combination. Okay. And number two is which number two is which which of the following is a heterogeneous mixture. So think about it. We have A B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B is sugar C is salt water and D is sun water.

[00:09:42]Which one is heterogeneous?

[00:09:47]All right, I think our 20 seconds is up.

[00:09:51]So our 20 seconds is up. So the correct answer is sun and water. I think I mentioned that as well. So sand and water when you put sand in water, you will see separation. So that's heterogeneous mixture. Okay.

[00:10:05]Number two.

[00:10:07]Number two. I'm sorry I skipped number two. So I use number three. So let's go.

[00:10:12]It's okay. Which of the following is a homogeneous mixture?

[00:10:16]Sun and water. Oil in water. Salt water salad.

[00:10:22]20 seconds.

[00:10:27]All right. So the correct answer I know you all agree is salt salt water which we just did uh which we just demonstrated not long ago. Okay. Number four is which is true which is a true or which is true about mixtures?

[00:10:45]Which is true about mixtures? They have fixed composition. B they cannot be separated. Content keep their properties.

[00:10:54]D they are always uniform.

[00:11:01]So the correct answer is C. The uh components keep their properties. So we said that is why we said they can physically um be be um be separated.

[00:11:15]Okay. Whether through filtration or evaporation whatever means whatever means is determined by the kind of component that you combine okay but they keep their component. So these are the property one of the properties that you need to they have a variable components okay they keep their components so that's why it's called a chemically born a chemically born thing is difficult to keep once you chemically combine something then it's gone okay all right number five which method can separate a mixture which method can separate a mixture is burning B is freezing permanently C is pration due chemical reaction 20 seconds.

[00:12:12]All right. So the answer correct answer is C as I mentioned that in the explanation. Yeah. So the methods that can be used to separate mixtures are physical methods and one of them is filration, evaporation, distillation. Those are the physical methods that we have in chemistry. Okay.

[00:12:33]So the correct answer here is filtration. Number six. A is an example of a compound, b element, c homogeneous mixture, d heterogeneous mixture. 20 seconds.

[00:12:55]All right. So the correct answer is homogeneous mixture. Okay. Air is made up of mixture of nitrogen, oxygen and all that those gases. Okay. Oil and water form a a solution heterogeneous b homogeneous homogeneous mixture sorry c heterogeneous mixture and d a compound 20 seconds number Oil and water form a a solution, b homogeneous mixture, c heterogeneous mixture, d compound.

[00:13:50]So the correct answer as we did the we demonstrated actually that is exact the exact one we demonstrated here long not long ago. So it's oil and that's heterogeneous mixture. Okay, that's the answer. C. Which of these is not a mixture? Which of this is not a mixture?

[00:14:11]Oxygen, milk, air, salt, water.

[00:14:16]20 seconds.

[00:14:37]Okay. [snorts] So the answer correct answer is A which is an element is not a mixture. It's an element. Okay. So the answer is oxygen. Number nine. Which type of mixture is milk? Which type of mixture is milk? A homogeneous 20 seconds. B heterogeneous.

[00:14:58]C pure substance and D elements.

[00:15:10]So the correct answer is homogeneous which is a okay milk is homogeneous. You don't see any physical particles once you pour out milk. You see everything is uniform. So that makes it homogeneous.

[00:15:25]Okay. Then the last one which statement is false.

[00:15:30]Mes can be separated physically.

[00:15:33]Misters have variable composition.

[00:15:36]Mes are chemically bond. Mes can be homogeneous or heterogeneous.

[00:15:43]20 seconds.

[00:16:08]All right. So the correct answer is C.

[00:16:12]Mus are chemically born which is not true. I told you this is a physical combination is not chemically born. So once you are doing mixes you know they are not chemically born because they retain their individual components.

[00:16:28]Okay. So now Your turn is your ob for you to practice something. Is cereal in milk a homogeneous or heterogeneous mixture? Please drop your answer in the comment section and please like uh like and subscribe to this channel and I will see you in my next video. Thank you.

[00:16:56]Welcome back to Pure Science Academy channel.

[00:17:01]Um, this evening I'm going to talk about mixtures in chemistry made easy.

[00:17:07]Mixtures in chemistry. Mixtures. When we talk about mixtures, mixtures is simply the physical combination of two two or more substance which are not chemically born together.

[00:17:20]Please note that word chemical not chemically bound together. They are just physically combined. There's a physical combination. We are going to talk about two main types. When we talk about mixtures in chemistry, depending on whatever level you are, there are two main types. And the two main types are homogeneous mixtures and heterogeneous mixtures.

[00:17:45]That's going to be our main topic for today. And we have at the end of this uh lesson you should be able to um boldly and confidently explain or differentiate between homogeneous mischief and heterogeneous mistress.

[00:18:03]um for better understanding um we are I'm going to get back to the to I'm going to get back to this slide but for better understanding I want to I wanted I want us to demonstrate this um from home you can even demonstrate this um subject of mischief from home and um I want us to briefly um I believe in practicality science is practical it's not theoretical. So I believe um when you have a hands on experience that boost your morale and that boost your experience and um I want us to do something real quick demonstrate something real quick from the house that um I get it. So let's get back to the lab. This is a something I found in my house that I want to demonstrate that.

[00:18:57]So we have have some water here that I'm going to pour in this. I have two glasses um not in the lab so I don't have um um proper um cylinder uh cylinders to use but then I'm just using my glass two glasses that I have in the house. I have my cooking oil. I have my table salt. So I'm going to demonstrate between homogeneous mixtures and heterogeneous mixtures. Okay. So I'm going to pour some water here.

[00:19:31]Okay. And I'm going to pour the rest of the water here. About the same level.

[00:19:37]Okay. About same level. All right.

[00:19:42]So, I'm using only one bottle of water.

[00:19:47]And the left side is going to be my homogeneous mixture. So, I'm going to pour a table salt. All right. Into one of them. Into the left one. Okay. And I'll pour oil, cooking oil. Okay. Into the other one. Okay. On the right, on my right, depending on how you are looking at it.

[00:20:13]Okay. So now I give it some few seconds.

[00:20:22]Okay. I give it a try to shake it together.

[00:20:28]I can to Try to shake it together. All right.

[00:20:32]Okay.

[00:20:34]So, as we can see, what can we tell about? Do you see any difference between the solutions, Kevin, between uh this one that I've holded up?

[00:20:45]>> Yeah.

[00:20:46]>> Do you see any difference like is there any separation between the two solutions?

[00:20:51]>> No.

[00:20:52]>> Yeah. So, as he said, no. So, there this means that this is uniform. This is the salt in the water. So he said event I think he eventually said yeah uh no eventually because it was settling out.

[00:21:05]Now you can see you don't see any difference. You can't even tell until you taste it. You cannot even tell whether it's just water or whether there's salt in there. So this is a a homogeneous mixture. Okay. This is a homogeneous mixture where we have a uniform um solution. Then when you look at if you look at this, do you see any separation Kevin?

[00:21:31]>> Yeah.

[00:21:31]>> Yeah. So you can see there are two phase separation in this solution. So we have the oil set on top with the water down.

[00:21:41]So we see a yellow and a white or colorless however you want to put it.

[00:21:48]Okay. So this is heterogeneous. So heterogeneous is not uniform. So there's two-phase separation where for homogeneous mixtures there are no they are uniform throughout the solution. You unless you taste it you cannot even know the other solution because it dissolves completely. Okay. So let's go back to our slide.

[00:22:09]Let's go back to our slide.

[00:22:12]Okay. So we go back to our slide after this um demonstration.

[00:22:19]We're going back to our slide. So as we said homogeneous mixtures are uniform solution throughout as we just demonstrated. Okay. And um example is salt and water as we just demonstrated.

[00:22:32]Uh sugar solution air and then hetrogenous mixtures as we saw we saw they are not uniform throughout the solution. There's a two-phase separation. An example is sun and water.

[00:22:46]If you don't want to use cooking oil, if cooking oil become expensive and you don't want to use that, you can just step out of your backyard and grab some sand and put in water and you should see a two-phase separation. And that's heterogeneous mixtures. Okay. And another example you can try in your house is salad. Okay. So you have salad, you have the lettuce, you have tomatoes, you have onion. depending on what you want to put in. When you mix with the um salad cream, you will still see the physical or individual um separation.

[00:23:18]So, key things I want you to take home uh tips I want you to know about mixture is that it's a physical combination.

[00:23:26]Okay? It's a physical combination is not chemically bond. What that means is that we can physically separate the individual components at the end of the day. So we can physically take uh separate the individual component. For example the salting water if you want to separate them we can do we example of the physical means we can do that is through filtration evaporation distillation or decantation. Okay. So uh these are basic things you got to know about mixtures. Um and I know it's time um um the semester is going getting closer to the end and I want us to try our hands on some quiz multiple multiple choice questions that you might probably find it or see it in your exams coming.

[00:24:21][clears throat] Um and I wanted to give oursel like 20 seconds for each question to think about. I want every I want us to think about for like 20 seconds for each question. I have about 10 of them real quick.

[00:24:36]Um so you'll get ready for that in the um as you can see the first question is asking us what is mixture or what is a mixture. So a says um so is on we have 20 seconds to answer this question. So as I'm talking think about it. So a chemical number one A is what?

[00:24:59]A chemical B between substances. B is a physical combination of substances. A is a pure substance. A D is a compound only.

[00:25:13]All right. So our time is up. Our our 20 seconds is up. So the answer the correct answer is a physical combination of substances. So as I said earlier on mixtures are physical combination of substances. A mixture is not one thing to note is not a chemically bond combination. It's a physical combination. Okay. And number two is which number two is which which of the following is a heterogeneous mixture? So think about it. We have a air add uh b is sugar c is salt water and d is sun water.

[00:25:58]Which one is heterogeneous?

[00:26:03]All right. I think our 20 seconds is up.

[00:26:07]So our 20 seconds is up. So the correct answer is sand in water. I think I mentioned that as well. So sand and water. When you put sand in water, you will see separation. So that's hetrogenous mixture. Okay.

[00:26:21]Number two.

[00:26:23]Number two. I'm sorry I skipped number two. So I use number three. So let's go.

[00:26:28]It's okay. Which of the following is a homogeneous mixture?

[00:26:32]Sun and water. Oil in water. Salt water.

[00:26:36]Salad.

[00:26:38]20 seconds.

[00:26:43]All right. So the correct answer I know you all agree is salt salt water which we just did uh which we just demonstrated not long ago. Okay. Number four is which is true which is a true or which is true about mixtures?

[00:27:01]Which is true about mixtures? They have fixed composition. B they cannot be separated. C company keep their properties.

[00:27:10]D they are always uniform.

[00:27:17]So the correct answer is C. The uh components keep their properties. So we said that is why we said they can physically um be be um be separated.

[00:27:31]Okay. Whether through filtration or evaporation whatever means whatever means is determined by the kind of component that you combine okay but they keep their component. So these are the property one of the properties that you need to they have a variable components okay they keep their components so that's why it's not a chemically born a chemically born thing is difficult to keep uh once you chemically combine something then it's gone okay all right number five which method can separate a mixture which method can separate a mixture is burning B is freezing permanently C is pration during a chemical reaction 20 seconds.

[00:28:28]All right. So the answer correct answer is C as I mentioned that in the explanation. Yeah. So the methods that can be used to separate mixtures are physical methods and one of them is pration, evaporation, distillation. Those are the physical methods that we have in chemistry. Okay.

[00:28:49]So the correct answer here is filration.

[00:28:52]Number six. A is an example of a compound, b element, c homogeneous mixture, d heterogeneous mixture. 20 seconds.

[00:29:11]All right. So the correct answer is homogeneous mixture. Okay. Air is made up of mixture of nitrogen, oxygen and all that those gases. Okay. Oil and water form a a solution heterogeneous b homogeneous homogeneous mixture sorry c heterogeneous mixture.

[00:29:33]and D a compound.

[00:29:40]20 seconds.

[00:29:47]Number seven.

[00:29:50]Oil and water form a a solution, B homogeneous mixture, C heterogeneous mixture, D compound.

[00:30:06]So the correct answer as we did what we demonstrated actually that is exact the exact one we demonstrated here long not long ago. So it's oil and that's heterogeneous mixture. Okay.

[00:30:20]The answer C. Which of these is not a mixture? Which of this is not a mixture?

[00:30:27]Oxygen, milk, air, salt, water.

[00:30:32]20 seconds.

[00:30:53]Okay. [snorts] So the answer correct answer is A which is an element is not a mixture. It's an element. Okay. So the answer is oxygen. Number nine. Which type of mixture is milk? Which type of mixture is milk? A homogeneous 20 seconds. B heterogeneous.

[00:31:13]C pure substance.

[00:31:16]and D elements.

[00:31:26]So the correct answer is homogeneous which is a okay milk is homogeneous. You don't see any physical particles once you pour out milk. You see everything is uniform. So that makes it homogeneous.

[00:31:41]Okay. Then the last one which statement is false.

[00:31:46]Mes can be separated physically.

[00:31:49]Misters have variable composition.

[00:31:52]Mes are chemically bond. Mes can be homogeneous or heterogeneous.

[00:31:59]20 seconds.

[00:32:11]All right. So the correct answer is C. Mus are chemically born which is not true. I told you this is a physical combination.

[00:32:34]It's not chemically born. So once you are doing mixes you know they are not chemically born because they retain their individual components. Okay. So now it's your turn. It's your turn. Your turn for you to practice something. Is cereal in milk a homogeneous or heterogeneous mixture? Please drop your answer in the comment section and please like uh like and subscribe to this channel and I will see you in my next video. Thank you.

[00:33:12]Welcome back to Pure Science Academy channel.

[00:33:17]Um this evening I'm going to talk about mixtures in chemistry made easy.

[00:33:23]mixtures in chemistry. When we mix when we talk about mixtures, mixtures is simply the physical combination of two two or more substance which are not chemically born together.

[00:33:36]Please note that word chemical not chemically born together. They are just physically combined. There a physical combination. We are going to talk about two main types. When we talk about mixtures in chemistry depending on whatever level you are there are two main types and the two main types are homogeneous mixtures and heterogeneous mixtures. because that's going to be our main topic for today and we at the end of this um lesson you should be able to um boldly and confidently explain or differentiate between homogeneous mischief and heterogeneous mistress.

[00:34:19]um for better understanding um we are I'm going to get back to the to I'm going to get back to this slide but for better understanding I want to I wanted I want us to demonstrate this um from home you can even demonstrate this um subject of mischief from home and um I want us to briefly um I believe in practicality science is practical it's not theoretical. So I believe um when you have a hands on experience that boost your morale and that boost your experience and um I want us to do something real quick demonstrate something real quick from the house that um I get it. So let's get back to the lab. This is a something I found in my house that I want to demonstrate that.

[00:35:13]So we have have some water here that I'm going to pour in this. I have two glasses um not in the lab so I don't have um um proper um cylinder uh cylinders to use but then I'm just using my glass two glasses that I have in the house. I have my cooking oil. I have my table salt. So I'm going to demonstrate between homogeneous mixtures and heterogeneous mixtures. Okay. So I'm going to pour some water here.

[00:35:47]Okay. And I'm going to pour the rest of the water here. About the same level.

[00:35:53]Okay. About same level. All right.

[00:35:58]So, I'm using only one bottle of water.

[00:36:03]And the left side is going to be my homogeneous mixture. So, I'm going to pour a table salt. All right. Into one of them. Into the left one. Okay. And I'll pour oil, cooking oil. Okay. Into the other one. Okay. On the right, on my right, depending on how you're looking at it.

[00:36:29]Okay. So now I give it some few seconds.

[00:36:38]Okay. I give it a try to shake it together.

[00:36:43]I can Try to shake it together. All right.

[00:36:48]Okay.

[00:36:49]So, as we can see, what can we tell about do we see any difference between the solutions, Kevin, between uh this one that I've holded up?

[00:37:01]>> Yeah.

[00:37:02]>> Do you see any difference like is there any separation between the two solutions?

[00:37:06]>> No.

[00:37:07]>> Yeah. So, as you said, no. So, there this means that this is uniform. This is the salt in the water. So he said event I think he eventually said yeah uh no eventually because it was settling out.

[00:37:21]Now you can see you don't see any difference. You can't even tell until you taste it. You cannot even tell whether it's just water or whether there's salt in there. So this is a a homogeneous mixture. Okay. This is a homogeneous mixture where we have a uniform um solution. Then when you look at if you look at this, do you see any separation, Kevin?

[00:37:46]>> Yeah.

[00:37:47]>> Yeah. So you can see there are two phase separation in this solution. So we have the oil set on top with the water down.

[00:37:57]So we see a yellow and a white or colorless, however you want to put it.

[00:38:04]Okay. So this is heterogeneous. So heterogeneous is not uniform. So there's two phase separation where for homogeneous mixtures there are no they are uniform throughout the solution. You unless you taste it you cannot even know the other solution because it dissolves completely. Okay. So let's go back to our slide.

[00:38:25]Let's go back to our slide.

[00:38:28]Okay. So we go back to our slide after this um demonstration.

[00:38:35]We're going back to our slide. So as we said homogeneous mixtures are uniform solution throughout as we just demonstrated. Okay. And um example is salt and water as we just demonstrated uh sugar solution air and then hetrogenous mixtures as we saw we saw they are not uniform throughout the solution. There's a two-phase separation. An example is sun and water.

[00:39:02]If you don't want to use cooking oil, if cooking oil become expensive and you don't want to use that, you can just step out of your backyard and grab some sand and put in water and you should see a two-phase separation. And that's heterogeneous mixtures. Okay. And another example you can try in your house is salad. Okay. So you have salad, you have the lettuce, you have tomatoes, you have onion. depending on what you want to put in. When you mix with the um salad cream, you will still see the physical or individual um separation.

[00:39:34]So, key things I want you to take home uh tips I want you to know about mixture is that it's a physical combination.

[00:39:42]Okay? It's a physical combination is not chemically bond. What that means is that we can physically separate the individual components at the end of the day. So we can physically take uh separate the individual component. For example the salting water if you want to separate them we can do we can example of the physical means we can do that is through filtration evaporation distillation or decantation. Okay. So uh these are basic things you got to know about mixtures. Um and I know it's time um um the semester is going getting closer to the end and I want us to try our hands on some quiz multiple multiple choice questions that you might probably find it or see it in your exams coming.

[00:40:37][clears throat] Um and I wanted to give oursel like 20 seconds for each question to think about. I want every I want us to think about for like 20 seconds. For each question, I have about 10 of them real quick.

[00:40:52]Um so you'll get ready for that in the um as you can see the first question is asking us what is mixture or what is a mixture. So a says um so is on we have 20 seconds to answer this question. So as I'm talking think about it. So a chemical number one A is what?

[00:41:15]A chemical B between substances. B is a physical combination of substances. A is a pure substance. A D is a compound only.

[00:41:29]All right. So our time is up. Our our 20 seconds is up. So the answer the correct answer is a physical combination of substances. So as I said earlier on mixtures are physical combination of substances. A mixture is not one thing to note is not a chemically bond combination. It's a physical combination. Okay. And number two is which number two is which which of the following is a heterogeneous mixture? So think about it. We have a air add uh b is sugar c is salt water and d is sun water.

[00:42:14]Which one is heterogeneous?

[00:42:19]All right. I think our 20 seconds is up.

[00:42:23]So our 20 seconds is up. So the correct answer is sand in water. I think I mentioned that as well. So sand and water. When you put sand in water, you will see separation. So that's hetrogenous mixture. Okay.

[00:42:37]Number two.

[00:42:39]Number two. I'm sorry I skipped number two. So I use number three. So let's go.

[00:42:44]It's working. Which of the flow is a homogeneous mixture?

[00:42:48]Sun and water. Oil in water. Salt water.

[00:42:52]Salad.

[00:42:54]20 seconds.

[00:42:59]All right. So the correct answer I know you all agree is salt salt water which we just did uh which we just demonstrated not long ago. Okay. Number four is which is true which is a true or which is true about mixtures?

[00:43:17]Which is true about mixtures? They have fixed composition. B they cannot be separated. Content keep their properties.

[00:43:26]D they are always uniform.

[00:43:33]So the correct answer is C. The uh components keep their properties. So we said that is why we said they can physically um be be um be separated.

[00:43:47]Okay. Whether through filtration or evaporation whatever means whatever means is determined by the kind of component that you combine okay but they keep their component. So these are the property one of the properties that you need to they have a variable components okay they keep their components so that's why it's a chemically born a chemically born thing is difficult to keep once you chemically combine something then it's gone. Okay.

[00:44:16]All right. Number five. Which method can separate a mixture?

[00:44:22]Which method can separate a mixture? A is burning. B is freezing permanently. C is penetration.

[00:44:30]D is chemical reaction.

[00:44:37]20 seconds.

[00:44:44]All right. So the answer correct answer is C as as I mentioned that in the explanation. Yeah. So the methods that can be used to separate mixtures are physical methods and one of them is evaporation distillation. Those are the physical methods that we have in chemistry. Okay. So the correct answer here is filration. Number six. A is an example of a compound, B element, C homogeneous mixture, D heterogeneous mixture. 20 seconds.

[00:45:27]All right. So the correct answer is homogeneous mixture. Okay. Air is made up of mixture of nitrogen, oxygen and all that those gases. Okay. Oil and water form a a solution heterogeneous b homogeneous homogeneous mixture sorry c heterogeneous mixture and d a compound 20 seconds number Determine oil and water form a a solution, b homogeneous mixture, c heterogeneous mixture, d compound.

[00:46:22]So the correct answer as we did what we demonstrated actually that is exact the exact one we demonstrated here long not long ago. So it's oil and that's heterogeneous mixture. Okay, that's the answer. C. Which of these is not a mixture? Which of this is not a mixture?

[00:46:43]Oxygen, milk, air, salt, water.

[00:46:48]20 seconds.

[00:47:09]Okay. [snorts] So the answer correct answer is A which is an element is not a mixture it's an element. Okay. So the answer is oxygen. Number nine. Which type of mixture is milk? Which type of mixture is milk? A homogeneous 20 seconds. B heterogeneous.

[00:47:29]C pure substance and D elements.

[00:47:42]So the correct answer is homogeneous which is a okay milk is homogeneous. You don't see any physical particles once you pour out milk. You see everything is uniform. So that makes it homogeneous.

[00:47:57]Okay. Then the last one which statement is false.

[00:48:02]Mes can be separated physically.

[00:48:05]Misters have variable composition.

[00:48:08]Mes are chemically bond. Misses can be homogeneous or heterogeneous.

[00:48:15]20 seconds.

[00:48:40]All right. So the correct answer is C.

[00:48:43]Mistress are chemically born which is not true. I told you this is a physical combination. It's not chemically born.

[00:48:52]So once you are doing mixes you know they are not chemically born because they retain their individual components.

[00:49:00]Okay. So now it's your turn. It's your turn. Your turn for you to practice something. Is cereal in milk a homogeneous or heterogeneous mixture?

[00:49:12]Please drop your answer in the comment section and please like uh like and subscribe to this channel and I will see you in my next video. Thank you.

[00:49:28]Welcome back to Pure Science Academy channel.

[00:49:33]Um this evening I'm going to talk about mixtures in chemistry made easy.

[00:49:39]mixtures in chemistry. When we mix when we talk about mixtures, mixtures is simply the physical combination of two two or more substance which are not chemically born together. Please note that word chem not chemically born together they are just physically combined. There a physical combination.

[00:50:00]We are going to talk about two main types when we talk about mress in chemistry. depending on whatever level you are. There are two main types and the two main types are homogeneous mixtures and heterogeneous mixtures.

[00:50:17]That's going to be our main topic for today and we at the end of this um lesson you should be able to um boldly and confidently explain or differentiate between homogeneous mischief and heterogeneous mistress.

[00:50:35]um for better understanding um we are I'm going to get back to the to I'm [clears throat] going to get back to this slide but for better understanding I want to I wanted I want us to demonstrate this um from home you can even demonstrate this um subject of mischief from home and um I want us to briefly um I believe in practicality science is practical it's not theorical.

[00:51:06]So I believe um when you have a hands on experience that boost your morale and that boost your experience and um I want us to do something real quick, demonstrate something real quick from the house that um I get it. So let's get back to the lab. This is a something I found in my house that I want to demonstrate that. So we have have some water here that I'm going to pour in this. I have two glasses um not in the lab so I don't have um um proper um cylinder uh cylinders to use but then I'm just using my glass two glasses that I have in the house. I have my cooking oil. I have my table salt. So I'm going to demonstrate between homogeneous mixtures and heterogeneous mixtures. Okay. So I'm going to pour some water here.

[00:52:03]Okay. And I'm going to pour the rest of the water here. About the same level.

[00:52:09]Okay. About same level. All right.

[00:52:14]So, I'm using only one bottle of water.

[00:52:19]And the left side is going to be my homogeneous mixture. So, I'm going to pour a table salt. All right. Into one of them. Into the left one. Okay. And I'll pour oil, cooking oil. Okay. Into the other one. Okay. On the right, on my right, depending on how you're looking at it.

[00:52:45]Okay. So now I give it some few seconds.

[00:52:54]Okay. I give it a try to shake it together.

[00:52:59]I come to try to shake it together. All right.

[00:53:04]Okay.

[00:53:05]So, as we can see, what can we tell about do we see any difference between the solutions, Kevin, between uh this one that I've holded up?

[00:53:17]>> Yeah.

[00:53:18]>> Do we see any difference like is there any separation between the two solutions?

[00:53:22]>> No.

[00:53:23]>> Yeah. So, as you said, no. So, there this means that this is uniform. This is the salt in the water. So he said event I think he eventually said yeah uh no eventually because it was settling out.

[00:53:37]Now you can see you don't see any difference. You can't even tell until you taste it. You cannot even tell whether it's just water or whether there's salt in there. So this is a a homogeneous mixture. Okay. This is a homogeneous mixture where we have a uniform um solution. Then when you look at if you look at this, do you see any separation Kevin?

[00:54:02]>> Yeah.

[00:54:03]>> Yeah. So you can see there are two phase separation in this solution. So we have the oil set on top with the water down.

[00:54:13]So we see a yellow and a white or colorless however you want to put it.

[00:54:19]Okay. So this is heterogeneous. So heterogeneous is not uniform. So there's two phase separation where for homogeneous mixtures they are no they are uniform throughout the solution you unless you taste it you cannot even know the other solution because it dissolves completely. Okay so let's go back to our slide let's go back to our slide.

[00:54:44]Okay so we go back to our slide after this um demonstration we're going back to our slide. So as we said homogeneous mixtures are uniform solution throughout as we just demonstrated. Okay. And um example is salt and water as we just demonstrated uh sugar solution air and then hetrogenous mixtures as we saw we saw they are not uniform throughout the solution. There's a two-phase separation. An example is sun and water.

[00:55:18]If you don't want to use cooking oil, if cooking oil become expensive and you don't want to use that, you can just step out of your backyard and grab some sand and put in water and you should see a two-phase separation and that's heterogeneous mixtures. Okay, another example you can try your house is salad.

[00:55:37]Okay, so you have salad, you have the lettuce, you have tomatoes, you have onion. depending on what you want to put in. When you mix with the um salad cream, you will still see the physical or individual um separation. So, key things I want you to take home uh tips I want you to know about mixture is that it's a physical combination. Okay? It's a physical combination is not chemically bond. What that means is that we can physically separate the individual components at the end of the day. So we can physically take uh separate the individual component. For example the salting water if you want to separate them we can do we can example of the physical means we can do that is through filtration evaporation distillation or decantation. Okay. So u these are basic things you got to know about mixtures.

[00:56:34]Um and I know it's time um um the semester is going getting closer to the end and I want us to try our hands on some quiz multiple multiple choice questions that you might probably find it or see it in your exams coming. Um and I wanted to give oursel like 20 seconds for each question to think about. I want every I want us to think about for like 20 seconds for each question. I have about 10 of them real quick.

[00:57:08]Um so you'll get ready for that in the um as you can see the first question is asking us what is mixture or what is a mixture. So a says um so my timer is on we have 20 seconds to answer this question. So as I'm talking think about it. So a chemical number one A is what? A chemical bond between substances. B is a physical combination of substances. A is a pure substance. A D is a compound only.

[00:57:45]All right. So our time is up. Our our 20 seconds is up. So the answer the correct answer is a physical combination of substances. So as I said earlier on mixtures are physical combination of substances. A mixture is not one thing to note is not a chemically bond combination. It's a physical combination. Okay. And number two is which number two is which which of the following is a heterogeneous mixture? So think about it. We have a air uh b is sugar c is salt water and d is sun water.

[00:58:30]Which one is heterogeneous?

[00:58:35]All right. I think our 20 seconds is up.

[00:58:39]So our 20 seconds is up. So the correct answer is sand in water. I think I mentioned that as well. So sand and water. When you put sand in water, you will see separation. So that's hetrogenous mixture. Okay.

[00:58:53]Number two.

[00:58:55]Number two. I'm sorry I skipped number two. So I use number three. So let's go.

[00:59:00]It's okay. Which of the flow is a homogeneous mixture?

[00:59:03]Sun and water. Oil in water. Salt water salad.

[00:59:10]20 seconds.

[00:59:15]All right. So the correct answer I know you all agree is salt water which we just did uh which we just demonstrated not long ago. Okay.

[00:59:25]Number four is which is true which is a true or which is true about mixtures.

[00:59:33]Which is true about mixtures? They have fixed composition.

[00:59:37]B they cannot be separated. C company keep their properties.

[00:59:42]D they are always uniform.

[00:59:49]So the correct answer is C. The uh components keep their properties. So we said that is why we said they can physically um be be um be separated.

[01:00:03]Okay. Whether through filtration uh evaporation whatever means uh whatever means is determined by the kind of component that you combine.

[01:00:13]Okay. by the they keep their component.

[01:00:16]So these are the property one of the properties that you need to they have a variable components. Okay, they keep their components. So that's why it's not a chemically born a chemically born thing is difficult to keep. Uh once you chemically combine something then it's gone. Okay. All right. Number five.

[01:00:33]Which method can separate a mixture?

[01:00:38]Which method can separate a mixture? A is burning. B is freezing permanently. C is pration.

[01:00:46]D is chemical reaction.

[01:00:53]20 seconds.

[01:00:59]All right. So the answer correct answer is C as as I mentioned that in the explanation. Yeah. So the methods that can be used to separate mixtures are physical methods and one of them is pration, evaporation, distillation. Those are the physical methods that we have in chemistry. Okay.

[01:01:21]So the correct answer here is filration.

[01:01:23]Number six. A is an example of a compound, b element, c homogeneous mixture, d heterogeneous mixture. 20 seconds.

[01:01:43]All right. So the correct answer is homogeneous.