Class 12 Chemistry | Osmotic Pressure | Assamese explanation #class12chemistry #chemistryinassamese

Added: 2026-05-12

[00:00:09]Good evening everyone.

[00:00:22]Good evening everyone.

[00:00:30]I recorded video English Android applications.

[00:01:13]So offline.

[00:01:26]Okay.

[00:01:29]Chapter one. Solution.

[00:01:32]Solution.

[00:01:35]Solution.

[00:01:58]com.

[00:02:15]Okay.

[00:02:17]online student. Okay.

[00:02:43]important property.

[00:03:14]Uh relative lowering relative lowering in vapor pressure relative lowering in vapor pressure right.

[00:03:28]So relative.

[00:03:39]for pure water.

[00:04:03]Pure water pressure.

[00:04:13]pressure.

[00:04:15]So, right.

[00:04:48]Download 97.

[00:05:07]chemistry. So water foreign.

[00:05:46]Okay.

[00:05:56]Very good.

[00:06:09]Settle down.

[00:06:39]nonvatile solute. Foreign speech. Foreign speech. Foreign speech.

[00:07:16]Then it becomes a solution.

[00:07:20]So solution of vapor pressure vapor pressure of solution vapor pressure of solution solution pressure.

[00:07:52]Pure water difference a difference key difference P minus Lowering in vapor pressure. Lowering in vapor pressure.

[00:08:39]Lowering in vapor pressure.

[00:08:50]Lowering pressure lowering pressure original pure Relative vapor pressure.

[00:09:24]That is called relative lowering in vapor pressure.

[00:09:37]Right. Yeah.

[00:09:43]Yeah. So relative pressure So pressure in terms of fraction.

[00:10:43]fraction of fraction of fraction of solution.

[00:11:15]fraction of sorry number of moles of B divided by number of moles of A Na plus number of moles of Bles number moles of B.

[00:11:49]Okay.

[00:11:54]fraction of fraction number of moles.

[00:12:23]and B2.

[00:12:42]Number of comparison to water.

[00:13:23]N plus compar. NB right fraction fraction.

[00:14:06]solvent number of moles by MB WB divided by MB Wid M PUS P / PL WB / MB W Okay.

[00:14:54]For relative.

[00:15:24]Next topic.

[00:15:26]Next elevation in boiling point boiling point.

[00:15:49]Basio support.

[00:16:01]relative to relative to elevation in boiling point.

[00:16:18]Elevation in boiling point.

[00:16:23]Boiling point.

[00:16:40]Next topic.

[00:16:58]India again.

[00:17:15]Okay. Next elevation in boiling point.

[00:17:30]So main question.

[00:18:14]Vapor pressure.

[00:18:16]A vapor pressure.

[00:18:18]pressure atmospheric pressure.

[00:18:46]atmosphere pressure at pressure.

[00:19:00]So temperature Boiling point boiling point.

[00:19:21]Okay.

[00:19:34]Nonvolatile.

[00:20:17]Boiling point at pressure.

[00:20:43]Fore system boiling point Already boiling point.

[00:21:50]100.05.

[00:22:17]So difference 100° in boiling point elevation in boiling point solution.

[00:23:04]TBY So a difference delta elevation in boiling point in boiling point.

[00:23:42]Okay.

[00:23:58]com.

[00:24:11]Yes or no?

[00:24:36]Okay.

[00:24:42]Relative vapor pressure in boiling Foreign speech. Foreign speech. Foreign speech.

[00:25:29]Well, to make this proportional to constantly proportional Elevation into M.

[00:26:37]Nextity W A M A Formula Well, for direct mass of solute.

[00:27:40]Mass of solute H Boiling pointing boiling point given mass Fore.

[00:29:16]So number two goal Next number two. Elevation. Depression.

[00:29:51]Depression in freezing point. Depression in freezing point.

[00:30:02]Depression in freezing point.

[00:30:08]Depression in freezing point.

[00:30:17]Freezing point or depression.

[00:30:19]Freezing point. Depression.

[00:30:32]Hi.

[00:30:59]Pure water.

[00:31:01]0° freeze.

[00:31:04]0° 0° nonvolatile solute.

[00:31:34]solution. Hey, solution.

[00:31:39]Freezing point.

[00:31:49]Ultimately, 1 2 3 depressing.

[00:32:36]Delta TF.

[00:32:38]Delta freezing point.

[00:32:50]Depression in freezing point.

[00:33:08]Foreventing freezing point solution or freezing point. American Download directly proportional to small letter M.

[00:34:54]Depression delta equal to KF. KF into M. KF into M.

[00:35:23]Nmericchorech.

[00:35:44]foreign.

[00:35:51]Okay.

[00:36:02]15 WB mass of 100 A glucose Delta TF into M2 WB0000.

[00:36:56]important.

[00:37:11]Yes. Delta TF = KF. Delta TF equal to KF into WB into 100,000 divided by W A divided by W A into MB into MB. Right.

[00:37:37]Delta TF depress 0us - 0 - WB 15 1500 W A 100 W MB MB Hi.

[00:38:40]So for key for negative.

[00:39:30]foreign.

[00:40:11]team number two. Next pressure.

[00:40:29]Osmotic pressure.

[00:40:53]pressure.

[00:40:57]Well, There you go.

[00:41:15]So, foreign.

[00:41:53]Hello Osmotic pressure.

[00:42:07]Alcohol number four. Osmotic pressure.

[00:42:21]for visible. Okay.

[00:42:58]Low concentration.

[00:43:00]Low concentration.

[00:43:03]Low concentration.

[00:43:13]Liquid.

[00:43:14]Low concentration liquid.

[00:43:24]Left side permeable membrane semi Permeable membrane.

[00:43:53]SPM.

[00:43:54]SPM.

[00:44:15]for low concentration liquid.

[00:44:44]Low concentration.

[00:44:54]Okay.

[00:44:56]Okay.

[00:45:05]Okay.

[00:45:19]Lower to spontaneous osmosis. A process osmosis.

[00:46:14]Best comment. Osmosis rightids.

[00:46:49]forchech.

[00:47:21]Excess pressure.

[00:47:25]Extra pressure.

[00:47:37]for Osmotic.

[00:47:52]Osmotic pressure.

[00:48:10]Don't Hi.

[00:48:38]So important topic.

[00:48:41]semi-permeable membrane low to high Pressotic pressure. So osmotic pressure is the minimum excess pressure required to stop the spontaneous flow of a liquid from a low concentration to high concentration through the semi-permeable membrane.

[00:49:47]So osmosis Fore! Foreign! Foreign!

[00:50:16]Osmosis particular temperature proportional to temperature.

[00:50:40]Pi proportional to Temperature directly proportional proportional to C. C means proportional to temperature or proportional to concentration proport R gas constant C R T Number of moles divided by E. Oh, sorry.

[00:52:15]Number of divided by volume number of volume into RT= N RT / V formula formula = CRT Number of moles.

[00:52:56]Number of given mass given mass mass into R into T / V W RT / MV Question for skin.

[00:53:59]Osmotic pressure.

[00:54:16]Reverse osmosis.

[00:54:20]Reverse osmosis.

[00:54:26]Reverse osmosis.

[00:54:42]arrow.

[00:54:48]So flow spontaneous pressure.

[00:55:40]Osmotic pressure.

[00:56:07]Pure water water.

[00:56:37]Reverse osmosis.

[00:56:45]Reverse osmosis.

[00:57:04]Pure water.

[00:57:07]Pure watermosis.

[00:57:18]formosis.

[00:57:31]So levels pressure, elevation, boiling point, depression, freezing point.

[00:58:02]English medium 4.0 chemistry 4.0 Contact number 93 652 06 675 93 6520607.

[00:58:35]Thank you everyone.

[00:58:38]Thank you.