CHEMISTRY & PHYSICS JAMB DAY-1 EXAMS REVIEW

Added: 2026-05-05

[00:00:00]All right, so guys I'm in a website already. We have five of us.

[00:00:58]I believe you can hear me, right? Please bear Today definitely will not be like yesterday.

[00:01:04]Hi everyone. Welcome. Can you hear me?

[00:01:50]All right, so um so good evening everybody.

[00:01:54]Please if you can hear me, just drop All right, you can hear me. That's that's good.

[00:02:02]We want to talk about um street physics and chemistry, but we want to focus majorly on the topic that some of us who attended today's um exams told us.

[00:02:26]So we have the first topic electrolysis is is both in physics and in chemistry.

[00:02:35]I want to tear electrolysis apart right now.

[00:02:47]Now, inasmuch as um you may not but JAMB actually have this is the same question bank that there is basically going to use.

[00:03:00]So electrolysis um after this probably look at projectiles, maybe I could just see a video we have projectiles as well.

[00:03:10]But this topic appears both in chemistry and in physics.

[00:03:16]Now, basically what are we going to be looking at?

[00:03:21]We're going to look at definition of project um electrolysis.

[00:03:25]Going to look at electrolysis of electrolytes.

[00:03:37]We're going to look at calculations. That is laws of electrolysis and calculations.

[00:03:48]So I have my two past questions here with me.

[00:03:51]I have the physics past questions and I have the chemistry past questions.

[00:03:56]Now, basically what exactly will I be doing?

[00:04:02]I'm going to go to the physics past questions on projectiles.

[00:04:08]Sorry, on the electrolysis. Now, for physics you also they also said that thermal expansivity came out.

[00:04:19]We may not do everything today, but we should be able to do something that tomorrow when you get to exam so you should be proud of yourself for attending today's class.

[00:04:31]All right, so before I kick start finally, I need to be sure that we are all in here with me and you can hear me clearly.

[00:04:40]So please if you can hear me clearly can you just drop a thumbs up for me?

[00:04:47]Thank you.

[00:05:08]All right, so let me check how many of us. I need a thumbs up if you can hear me clearly.

[00:05:18]Okay.

[00:05:22]That is good.

[00:05:24]Electrolysis is about to experience the worst heat of his life.

[00:05:30]I'm about to experience the worst heat of his life.

[00:05:33]So let's go back to this.

[00:05:36]Electrolysis is about to experience the worst heat of his life.

[00:05:43]Yesterday we started off, but we could not finish.

[00:05:47]So today even if it's two topics that we able to achieve today, I'll be so happy.

[00:05:52]So today we want to start with electrolysis.

[00:06:20]Now we have electrolysis. Now first what is electrolysis? By definition, it is a chemical decomposition of a substance through the passage of electricity.

[00:06:55]Oh.

[00:06:57]Electrolysis is a decomposition of a substance through the passage of electricity.

[00:07:02]Now, imagine a case whereby human beings if electric shock shock humans um for a very long period of time, the human would tend to die.

[00:07:14]All right, because as the light is shocking you, you're losing something.

[00:07:17]You're decomposing.

[00:07:20]All right, so I would say yeah, that process is not the really electrolysis, but I want us to understand what this means.

[00:07:27]Right? So anytime current passes through something and after each time a current passes through something, that guy do not tend to remain the same again.

[00:07:39]You can say that that process is probably electrolysis. Electro lysis means breaking.

[00:07:48]Electro means electricity. Is that means?

[00:08:19]Okay, so since you now understand that the next you want where does electrolysis take place?

[00:08:28]Electrolysis take place in what we call electrolytic cell.

[00:08:37]or electrolytic cell In an electrolytic cell electrolytic cell comprises of two electrodes. Two electrodes.

[00:08:50]The first electrode we call it the cathode.

[00:08:55]The second electrode we call it the anode.

[00:08:59]Now, cathode is where reduction takes place.

[00:09:05]Reduction occurs at the cathode while oxidation occurs at the anode.

[00:09:16]Okay.

[00:09:17]Now this is how electrolytic cell looks like. We have a container that has two metal ion probably like this. Now, both of them connected with a wire.

[00:09:33]Inside this container, there is what we call electrolytes.

[00:09:43]Now, what is electrolyte? Electrolytes can be in a liquid form or in a molten Liquid and molten is almost the same.

[00:09:53]Liquid or molten or Now, what are electrolytes? They are basically ions that conduct electricity and in the process, they are being decomposed.

[00:10:09]So, I wouldn't want to go into detail. I just want to ask you follow up. We've seen the definition of electrolysis.

[00:10:16]I've told us electrolysis normally take place inside electrolytic cell.

[00:10:21]Now, inside electrolytic cell, what are the composition of an electrolyte because every electrolytic cell must have two electrodes and also electrolytes.

[00:10:34]For the two electrodes, we have the cathode and anode while oxidation occurs at the anode.

[00:10:40]Electrolyte is basically the liquid It's more It's a liquid. We normally call it salt of the metal.

[00:10:51]All right? So, electrolytes can be in a liquid form, molten or aqueous.

[00:10:56]Now, example of electrolytes I don't want to jump into calculation first. Example of electrolytes We have strong electrolytes and weak electrolytes.

[00:11:24]Example of strong electrolytes are what we call the strong acids and strong base.

[00:11:35]And example of weak electrolytes are the weak acid and the weak base.

[00:11:47]Now, what are example of strong electrolytes?

[00:11:50]We have acids, HCl um H2SO4 um H3PO4 um HNO3 um etc. Strong acids and also have salts.

[00:12:09]Salts.

[00:12:10]NaCl is a salt.

[00:12:13]Right? Salt solution can also serve as an electrolyte. NaCl can have silver nitrates.

[00:12:21]We can have um um copper nitrates.

[00:12:31]etc. Now, for strong base, we have can have sodium hydroxide um calcium hydroxide.

[00:12:47]Now, for weak acid, we have organic acid water organic acid and base. Now, why am I giving us all of these?

[00:13:00]Because they can ask you some basic questions and say, "What is electrolysis of HCl?"

[00:13:06]What is electrolysis of HCl?

[00:13:10]Class, let me let me be sure you guys are following. Please, if you are following up to this point, can you give me a thumbs up?

[00:13:18]If you are following up to this point, can you give me a thumbs up, please?

[00:15:42]Can you see my screen now?

[00:15:51]Can you see my screen now?

[00:16:19]I'm on We must hold this class through.

[00:16:21]I don't understand these late taxes.

[00:16:43]If you like, say naturally, they want to set tomorrow.

[00:16:49]But, don't worry. I'm not going to end this class soon.

[00:16:52]Today, I went to go and buy fuel cuz no matter what, the class must hold.

[00:16:59]Somebody shouts, "Power!" Shout, "Power!"

[00:17:04]I want this class to hold. Shout, "Power!"

[00:17:17]I'm on It will hold, though.

[00:17:20]All right. So, I'm trying to see what the issue is.

[00:18:01]Now, believe it or not, it won't work for you. So, let's try again.

[00:18:27]Can you see it again?

[00:18:29]As it come up,