Raoult's Law - How To Calculate The Vapor Pressure of a Solution

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This chemistry video tutorial provides a basic introduction into Raoult's law which says that the vapor pressure of a solution is the product of the mole fraction of the solvent and the partial pressure of the pure solvent at a given temperature. This video explains how to calculate the vapor pressure of a solution with a nonvolatile solute. It also explains how to calculate the mass of solute / glucose needed to reduce the vapor pressure of the solution to a certain value.
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6 окт 2024

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Комментарии : 95

@TheOrganicChemistryTutor 3 года назад

Chemistry PDF Worksheets: www.video-tutor.net/chemistry-basic-introduction.html Full-Length Videos & Exams: www.patreon.com/MathScienceTutor/collections Direct Link to The Full Video: bit.ly/3VY3X8p

@janellemedrano3072 8 месяцев назад

Rather than reading the textbook and looking at cluttered examples, I just watch his videos. Such a life saver the night before the test!

@jwhebegw5401 6 месяцев назад

How your exam go

@DailyGraceInChrist 5 месяцев назад

@@jwhebegw5401 i have an exam in like 20mins, pray for me😭😭

@SyenPie 11 месяцев назад

FANTASTIC concise explanation and the practice questions you chose were perfect at covering this topic. Thank you!

@litchfirmian7562 3 года назад

Why is the timing so perfect, my prof have just finished teaching this topic.

@cayanlamanna 3 года назад

Ikr

@jamantymiyarboe7741 3 года назад

Are you in university

@cayanlamanna 3 года назад

@@jamantymiyarboe7741 kinda. CEGEP

@jamantymiyarboe7741 3 года назад

@@cayanlamanna that’s good

@umargilani9820 3 года назад

Maybe your professor was also learning from here and then teaching you

@deadbzeus 3 года назад

You are the best! I appreciate all your work making all these videos, You are an amazing science communicator.

@ronielyncuison7244 2 года назад

I would like to correct or point out a slight mistake in the last problem. Both sides should be divided by 0.9765. The answer would be 0.3338 moles.

@sachinbhandari3506 2 года назад

Yeah that confused me for a bit

@JayAgustin-ic5cl 10 месяцев назад

he converted it into gram. that 0.3338 is a mol

@Blackcloue 7 месяцев назад

@gulnazfatima441 5 месяцев назад

@@JayAgustin-ic5cl yeah so what's wrong?

@JayAgustin-ic5cl 5 месяцев назад

@@gulnazfatima441 there’s nothing wrong. lol

@georgeneighborhoods8384 11 месяцев назад

WTF, I always search for physics problems and you're always in the top of my search. Thank you.

@jordanbeavers9827 2 года назад

Your channel is about to help me pass CHEM II in collage cause of how bad of a job my proffesor is doing. And guess what? He's the only one teaching the class so I can't even change teachers.

@PauloJAdams 2 года назад

Same. Im at FAU

@ferdushmiah6528 11 месяцев назад

sameeeee my professor's way of teaching gen chem II is not the way i learn at all

@jyotijangir5969 3 года назад

this is making my study very easy thank you so much, the organic chemistry tutor

@georgesadler7830 5 дней назад

Professor Organic Chemistry Tutor, thank you for a basic Introduction and explanation of Raoult's Law and how it's used to calculate Vapor Pressure of a Solution in AP/General Chemistry. Th example problems are awesome when it comes to calculating Vapor Pressure, however, there is an error in problem number three at the 13:01 minute mark. Professor Organic Chemistry Tutor, there is a division error in your calculation. Please correct this error in the video.

@smzgdi385 3 года назад

How are you man? Long time no see.

@jia-xuan-shuo 3 года назад

You’re my life savor. Yet at 13’10”, I believe the denominator is supposed to be 0.9765. I made lots of similar mistakes.

@venuss.7218 3 года назад

yep.

@PatrickPetro-n6s Месяц назад

Big up ,God bless ue u had helped at a great extent

@iqbalmahmud5072 3 года назад

you got everything i need

@sofyandiab6245 2 года назад

thanks alot man, you're a life saver

@anomatricwizard7015 3 года назад

Why u post this the day after the exam that I needed this ;-; jk, great video!

@vaibhavimarathe9189 3 года назад

thank you so much u have no idea how much this helped

@Mister_F 3 года назад

Thanks!

@sparklecakes3539 21 день назад

I wish that some of the questions weren't on patreon and the video too. I don't have any money lol

@mayaratner6996 2 года назад

You are a godsend

@ghostveiwer4649 2 года назад

Thank you man, you have saved the day 👍

@pete4043 2 года назад

JG is an absolute monster

@mysciencecruise9708 2 года назад

thank you so much. this is very helpful

@think_logic 3 года назад

perfect timing!

@Gentleman139 5 дней назад

If you can please answer. How do you know what to find when the question asks what the vapor pressure?

@meniscusmedical2471 3 года назад

Slight error with the numbers sir. just 0.9765 and not 0.9675 but other than that thank you.

@Addiwasabi 3 года назад

can someone explain why at 5:38 he calculates the molarity, but not of the compound. Instead the # of ions??

@toperaheem 2 месяца назад

From what I could discern it's because CaCl2 is an ionic compound and after calculating the number of moles of the entire CaCl2 compound as a whole, we need to take into consideration the no of ions in the compound and multiply the number of moles by that number as opposed to the previous question where C6H12O6 is a molecule which doesn't break down into ions so we just calculate the number of moles directly

@nijienjoyer_ 3 года назад

LITERALLY NEEDED THIS RN SHJSHSJKSH

@kimanhchung8372 3 года назад

Thanks

@corneliusmathebula9832 Год назад

how can you tell if an ionic solute is given in a question? like the difference between the 1st and 2nd question?

@serpentsage 11 месяцев назад

When there are metal and nonmetal atoms bonded together, it forms an ionic compound.

@shivanireddy3993 7 месяцев назад

Why moles of ions? Can't we take no Of moles of cacl2 directly?

@value2887 3 года назад

Why did you use the mols ions on the second one and not the first

@toperaheem 2 месяца назад

@Cristi05_ 5 месяцев назад

Ok so you mentioned at 6:30 that you need to mutiply by 3 ions and you explained how CaCl2 forms one calcium ion and 2 chlorine ions. How were we supposed to know that? That shoudnt be just something we have to memorize Im sure right. Would that be something your teacher would have to give you kind of like the periodic table of elements. How are we supposed to know how many ions form from a solute dissolving? Please explain this

@feyruza9250 Год назад

Sir thhank you so much for all but the secound exampl that you work with ion wes new for me could you make avidio sbout that ❤❤❤❤❤

@Gentleman139 6 дней назад

Why do you find the mole fraction specifically for water?

@este4911 8 месяцев назад

why did we have to convert the moles of cacl2 to ions for the second problem but not the first problem?

@engertejada6930 7 месяцев назад

Because glucose is not an ionic compound, CaCl2 is

@Cristi05_ 5 месяцев назад

@@engertejada6930 how are we supposed to know CaCl2 is an ionic compound. No way you have to just memorize every single compound formula right? Is this something your teacher should give you?

@weewuwu7583 20 дней назад

@@Cristi05_An ionic compound is just a metal and a nonmetal

@0101-o1q 3 года назад

is the last example here correct? i computed for the mol of glucose and it turned out 576.64 mol (although i doubt this because the solvent should be greater). When i inserted this in the Raoult's equation it resulted to 54 Torr. Correct me if I'm wrong tho thank you

@Micahiscoo 3 года назад

2 months old but just here to tell you, he read his mol wrong, so I’m guessing what you got is the correct answer.

@0101-o1q 3 года назад

@@Micahiscoo lmao thanks! It's already vacation but I appreciate the reply man God bless on your studies

@leandrangnelong6727 2 года назад

How would it be if we're to find the vapour pressure of only one substance and not the entire solution...??

@hazy4536 5 месяцев назад

I love you

@awuahedward5435 2 года назад

why did u not change mL to L

@suuushitrash 5 месяцев назад

at 0:55 , mind if i ask why should the answer be less than 23.8 torr?

@16_bit_Jitu 4 месяца назад

dont know if you need it anymore or not but the bases of raoult's law says that the vapour pressure of solvent decreases if you mix a Solute

@tatianadavis1792 3 года назад

I want to pay for the full videos but the website he uses has bad reviews in regards to monthly payments and card problems. If there was a way to use a private website, I would definitely subscribe!!

@sampurnachakma1922 3 года назад

I'm 4th✋

@n.9354 3 года назад

at the last example, i didn't understand why he multiple the moles by 180.15.. from where did he get that number?

@lenamathew5713 3 года назад

180.15 is the molar mass of glucose. To convert moles to grams you have to multiply the number of moles( here he got 0.337 moles) with the molar mass. (in this case, multiply it with the molar mass of glucose)

@n.9354 3 года назад

@@lenamathew5713 Oh i see! Thank you so much!

@francise.j.verzosa710 3 года назад

@ssv.1 3 года назад

Lie lol

@lexidavis7002 3 года назад

Very fitting, he posted this right when I needed it. You're the best!!

@betielyonas8649 3 года назад

Yeah! mine too!

@kyf6705 2 года назад

1mL=1g you're welcome

@sakhemcetywa6847 3 года назад

I'm among the first😎

@zakajadi2744 2 года назад

Can you explain when you're trying to find the mole of the compound you put the molar mass as 'g' instead of gmol^-1.Also why are you dividing the the number of moles by the molar mass instead of using the mole formula = mass/molar mass to find the mole of the compound. Thanks