Collecting Gas Over Water Practice Problems - Chemistry Gas Laws

[@TheOrganicChemistryTutor]

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[@ReigninAmazin17]

My friend, your videos are incredibly useful and you definitely have a rare gift for teaching in a way that is uncommon among other KZbin teacher/tutors. I'm also glad you've since invested in a sharper pen! Haha cheers!

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[@georgesadler7830]

Professor Organic Chemistry Tutor, thank you for a step-by-step explanation and analysis of Collecting Gas Over Water Practice Problems in AP/General Chemistry. The practice problems really emphasized the importance of vapor pressure of water and temperature in Chemistry. Conversions is also another important tool in all levels of Modern Chemistry. Thís is an error free video/lecture on KZbin TV with the Organic Chemistry Tutor.

[@havok4738]

OMG THANK YOU!! I had no clue how to solve these problems! also I have my chem test in six hours and I still need to go to sleep!! 😀🔫 wish me luck 3/26/21

[@ajwhoopy]

Good luck!

[@IndigoMist44]

how did it go? I've got my test in t-9 hours!

[@havok4738]

@@IndigoMist44 im glad im back here so thx for commenting. i dont remember exacly what i got but it was probably around a 90 or so. i cant go back to see my test grades cuz i took the class last year. i did really well first semester and then not so well in the second. anyways, good luck!

[@curtistrinh5654]

Omg slay

[@bobthebb-illder827]

Thanks for this video. For anyone who’s watching, please try to attempt each problem before he finishes it and when you get the questions right you will feel good. However, Once you finish the video without trying and re watch it to do so, it won’t work as well...

[@curtistrinh5654]

I felt good! I got this problem wrong on my exam because I mistakenly did the total pressure rather than getting the partial pressure.. :9

[@richphero106]

Wow thank you! Typical engineering first-year chemistry problem, I thought I would never find this!

[@curtistrinh5654]

Fr

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My friend, you're a life saver.

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If I know you earlier, I won't be so stress about AP Chemistry

[@jackli3989]

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[@vicenteparedes9418]

Great video. Very helpful. Thanks!

[@vrks1353]

7:33 I think the kelvin calculation there is wrong as 22 degrees celsius is 295.15

[@georgesadler7830]

He uses 273 instead of 273.15 for the conversion to Kelvin.

[@thomaslee4727]

One of the biggest donation

[@timewrath7723]

At around 10:36, why is the partial pressure for O2 calculated? Just wondering why it's O2 instead of some other substance regarding the finding of partial pressure.

[@arkabahce350]

because only o2's volume was given

[@basicconcepts5010]

It’s the gas produced in the reaction.

[@tylerjohnson6317]

Anyone else grinding these out for the ap exam

[@ravenjwls55]

I’m doing this for a AP Chem test😭

[@despoina0023]

yuppp let’s see how online ap chem will turn out

[@animethighss69]

unfortunately yes

[@tylerjohnson6317]

@@animethighss69 have fun I got a 2 lol

[@Kimberly-wu2hb]

quick question.......out of all the R constants, why is it the one with atm you decide to use as your R

[@masonballard399]

Because the ideal gas law equation applies to atm, so using that R constant would cancel out the atm variable

[@med8615]

Thanks so much.

[@sophie5964]

THANK YOU!

[@danieldianati1668]

Do you round up the answers with respect to the sig figs?

[@twistiicuber1055]

Did you figure it out yet

[@ryanshema8409]

Your the best

[@maimostafa5579]

I’m confused, why do we have to convert from torr to atm if both pressures were given in torr…

[@konweiduong]

cuz u have to use standard units (atm, liters, kelvin, moles)

[@nancydrew666]

I love you

[@estherkim475]

What if there was also a pressure of air in the flask along with water?? so confused...

[@elizabeth.nichols0768]

There will be no air: the procedure for this type of gas collection begins with the flask full of water (to displace all the air) inverted over the reaction (to collect the gas periodic by displacing the water) I know this is late, but maybe it will help someone else who has the same concern?

[@elizabeth.nichols0768]

This is a really long question, so bear with me. I don't understand why we can use the total volume of the sample to calculate moles of nitrogen collected. - if we change the pressure (by finding the partial pressure of nitrogen) shouldn't that also change either the volume or temp? If we removed the water vapor from the container but kept the pressure of the nitrogen constant (at its partial pressure which would then be the total pressure), wouldn't that change the volume? Is it somehow tied to kinetic-molecular theory? Thanks for these videos! I'm teaching high school chemistry but my degree is in biology and my students are really smart and always ask questions like that (above) so whenever I feel like my understanding is tenuous I come here!

[@elizabeth.nichols0768]

Oh I think I've got it - if the water vapor was removed, the nitrogen would be occupying the total volume at its partial pressure. But now I don't get why the temp doesn't change 🤦‍♀️ decreasing the pressure (bc water vapor is no longer exerting any pressure on the gas) should decrease the temperature? But the pressure of the nitrogen itself isn't changing, so temp would be the same? But then the volume of the nitrogen itself is increasing so the temperature should increase?

[@camerashysd7165]

hello JG do you have an email adress i can contact you with i have these tutorial questions that i would appreciate if you would look at they are so nuanced but simple in thier solutions id like if you could explain some of the theory behind solving them

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[@imam3801]

Thank you!