Stoichiometry

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028 - Stoichiometry
In this video Paul Andersen explains how stoichiometry can be used to quantify differences in chemical reactions. The coefficients in a balanced chemical equation express the mole proportions in that reaction. These values can be used to predict the expected values, determine the limiting reactant, predict the molar mass of gases, determine the percent yield and interpret results from a titration.
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Title: String Theory
Artist: Herman Jolly
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All of the images are licensed under creative commons and public domain licensing:
Amit6. English: Unicode U+2441 ⑁ Ocr Chair, September 24, 2011. Own work. commons.wikimedia.org/wiki/Fil....
File:Balanced Scales.svg, n.d. commons.wikimedia.org/wiki/Fil....
File:Bunsen Burner.jpg, n.d. commons.wikimedia.org/wiki/Fil....
"File:Carbon Dioxide 3D Spacefill.png." Wikipedia, the Free Encyclopedia. Accessed August 22, 2013. en.wikipedia.org/wiki/File:Car....
File:Flametest--.swn.jpg, n.d. commons.wikimedia.org/wiki/Fil....
"File:Methane-3D-space-filling.svg." Wikipedia, the Free Encyclopedia. Accessed August 22, 2013. en.wikipedia.org/wiki/File:Met....
"File:Water Molecule 3D.svg." Wikipedia, the Free Encyclopedia. Accessed August 22, 2013. en.wikipedia.org/wiki/File:Wat....
Michou311. Français : Stickman, February 18, 2012. Own work. commons.wikimedia.org/wiki/Fil....
Ulflund. English: Space-filling Model of the Oxygen Molecule (O2) Created with Jmol (chemapps.stolaf.edu/jmol/jmol...., July 18, 2012. Own work. commons.wikimedia.org/wiki/Fil....

Опубликовано:

27 авг 2013

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Комментарии : 175

@mattpletkovic9441 9 лет назад

Been helping me since 7th grade and I'm a junior. Wish he could just teach everyone in the US from their home instead of wasting our whole childhood in a jail of a school.

@jefenstein7694 5 лет назад

@@nathanreed2087 House arrest is better than actual jail/prison.

@rod.rigohh 4 года назад

It's not as fun as it sounds...

@slyassassinxx4466 4 года назад

well your wish came true

@DianeSteele 4 года назад

Didnt age well, friend

@tthomas2348 4 года назад

So this is your fault huh

@faustus2058 7 лет назад

I just learned more about stoichiometric methods in ten minutes than I learned from six weeks of being in a class room. I wish I could fire my professor, I swear to god.

@noodlesRawsome24 7 лет назад

-Jastroyer- same, my professor is so slow ugh, I just ended up stop going to his lectures and reading the textbook

@26b-tembliquealexis73 4 года назад

The first channel on chemistry that really makes sense not trying so hard to look smart like crash course channel or khan academy. You sir saved my life.

@downstreamthoughts 9 лет назад

Wow after 2 years of college, and a bit of frustration with Chemistry, I find a free site on RU-vid that does a much better job of teaching and laying out the basics. I wish all teachers used this multi dimensional approach that blends so many different learning styles together. I have been stuck trying to teach myself Chemistry. There is something wrong with how our education system works. Thank you for your amazing, clear videos. PS Love the mind-map like concept maps.

@bzkcarter 10 лет назад

Mr Andersen, you really helped me get through my first year of college. Year two and still watching. Thank you.

@angelahedderick2644 5 лет назад

My son had to be pulled out of regular school and homeschooled as a junior because of immune system issues. Thanks very much, Mr. Anderson, for helping us through this! He and I are learning chemistry together. You do an excellent job.

@jacobsalas77 9 лет назад

My Chem teacher wasn't clear at all and I've looked at various RU-vid videos but still didn't understand stoichiometry. ..thank you so much

@starrw1041 10 лет назад

I am in AP Chem this year and have been searching all over youtube for some good videos on stoichiometry, and this has been the first one that has actually helped. Thanks!

@thelitpewdiepie3275 7 лет назад

Thats it, im working at mcdonalds😂

@RANDOMGUY2101 6 лет назад

but stoich is one of the easier things in chem?

@abbyhoneywaffles 3 года назад

@@RANDOMGUY2101 not for some people?

@blusnoartofficial8665 3 года назад

I'll just stay where I am 😂😂

@voidpriestess8339 3 года назад

@@RANDOMGUY2101 that is a very subjective statement good sir

@gracestelmach291 5 лет назад

6 years later and you still helping people out God bless you omg !!!! finals this week !!

@RamenSploosh 9 лет назад

Wow... that was actually EXTREMELY helpfully and easy to follow! Thank you so much :D

@saturn1413 5 лет назад

took me a while to find a video of a person who ACTUALLY does it the way my teacher wants BLESS

@joshbarrett4138 4 года назад

This man has gotten me through every one of my science classes in high school and college. Don't understand something....? Don't waste your time with anything else just look up bozeman. My environmental science teacher in high school didn't teach anything herself, she just put up videos of him. What a godsend he is.

@tattooed_nana7363 5 лет назад

Love these videos. You have helped me so much in the past 2 semester. Thank you!!!!

@stuartnan9787 5 лет назад

Thank you for all the help. I received 5 for AP Bio all thanks to you, I really appreciate all the hard work that you've put into the videos. (regardless of past or present)

@katelynwinge7187 8 лет назад

omg such a throwback this video helped me get an A in honors chem i miss stoich so much literally physics makes me cry

@mmeyarham4095 6 лет назад

Thank you for these videos. They are so good that I show them even in my French Immersion Chem class. Much appreciated. :)

@TVMythic 8 лет назад

One of your best videos, in all honesty

@nightfox380 8 лет назад

You just saved me at least an hour of reviewing powerpoints on titration within 1 minute

@RichardGarber 11 лет назад

Very helpful! I subscribed to Bozeman Biology last year while taking AP Biology, and I was quite happy that you were doing AP Chemistry videos this year (correlating with my own progress). Hopefully you'll be making videos for AP Physics B next school year...

@paulcrozier405 9 лет назад

It is because of your videos, that I may be getting a good grade in Chem 1A this year! Keep up the good work. :)

@deepcoma898 6 лет назад

wwwwwwait.... where did 6.19g/ CO2 come from? I know its the actual but where/how did he calculate it? He just ...put it up there

@pineapplerindm 5 месяцев назад

he's simulating the yield he would get if he actually did that reaction and measured the yield of CO2 but since he didn't do it, it's pretty much random

@yungpoptart 7 лет назад

When he finds the limiting reactant in 5:50, how do you know whether to use CO2 or H2O? Thanks.

@Daniel-fb1qd 9 лет назад

Thank you, you broke it down so easily for me, thank you once again

@madisenbailey8013 9 лет назад

You explained it better than my college professor did. Thank you!!!

@Celestial.moon. 9 лет назад

Thank you! I was having a hard time making the connection from the way my teacher had done it, but you cleared it up for me!!! Off to my quiz!

@Celestial.moon. 3 года назад

Hahahaha thanks. I have no idea how I did. But I graduated so it probs wasn't so bad

@johnbingham6355 4 года назад

In all,Paul Anderson is the master of analogy,making the difficult easy to understand.

@amitgodara6985 9 лет назад

U r the best teacher Paul.Got special teaching skills.U interacts very well even through videos.how???????????????????????

@arbab2569 5 лет назад

This dude just summarized more concepts and made it make sense compared to my teacher who took two lectures to cover this.

@mumu6880 6 лет назад

happy teacher' day Mr . Anderson!!!

@Ryan-su7vt 7 лет назад

thanks man! very helpful.

@Eli-ns5uw 9 лет назад

i'm in the 7th grade understanding this pretty well, you have a talent for teaching! thank you

@akaijahr8219 4 года назад

@5:57, how is oxygen the limiting reactant when it's less than the amount we were given? Isn't limiting reagent is where the product that's greater than what was given. I thought Methane would be the limited because its out of the amount that's give to us, It's 27.4 and we were given only ten grams of it. Can someone explain?

@Soma2501 8 лет назад

7:45 you could cross out the 22.4 from the numerator and denominator to make calculations quicker (must keep the L H2O at the end though)

@nicholaskhawli8435 4 года назад

Can u convert from liters to grams using the bridge ??

@sarahcall7977 8 лет назад

This is so helpful 🙌

@YazminAbat 4 года назад

Excellent foundations explanation. Keep it up :))

@nataliep5545 7 лет назад

I'm confused, in the Expected Product section, why is the yeild of H2O 55.2g? Isn't the formula mass of H2O, 18.02, * 2 = a yeild of 36.03g?

@lwaheeba 10 лет назад

Ok but I have a question. What if we have the molecules of something. How do we get from that to the moles to find the limiting reactant? Please help. I have a test in 2 days and I'm so confused on that.

@hemanivetytha4679 7 лет назад

wonderful explanation

@thepandagirl96 11 лет назад

Thankyou so much for posting this, I have a test on stoich tomorow! :) what luck...

@Hababadababa 9 лет назад

I love you , you're so kinda for helping

@nathanbucolo2191 9 лет назад

Hi everyone! I'm currently doing Stoichiometry and was given this question: A compound consists of C, H and O only. When 10.68mg of this compound undergoes combustion 16.01mg CO2 and 4.37mg H2O are produced. The compounds molar mass is 176.1 g/mol. Determine the molecular formula of the substance. I can get part way through it but I was wondering if anyone here could help me out? Cheers

@brandomalqui2097 9 лет назад

thanks man i was stuck on this chapter before watching this video

@kakerlake650 11 лет назад

i really like your videos keep it up :)

@trumans.7106 8 лет назад

how did he get the actual yield?

@haydenbradley382 6 лет назад

This helped a ton, thanks

@NewPSCity 10 лет назад

Seems easy and with more practice ill get better, Thanks!

@leashamehta7670 10 лет назад

thank u for saving my life

@its_EZ 11 лет назад

Holy sh** you're the best. My test for stoichiometry is next week :D

@valfastenau3891 9 лет назад

You are a life saver!!! Chem 141 at MSU would be so much better if you were teaching it.

@saboot.a8640 4 года назад

8:51 what does soln mean?

@klaitor55 10 лет назад

god thank you so so much!!! my teacher went over this in like 2 seconds and made it so hard to comprehend

@yonatan0910 8 лет назад

thanks it really helps a lot

@hs3545 3 года назад

Thanks for the help! I understand a lot more now :)

@user-zr3wr7oe5p 9 месяцев назад

What a great explanation

@estringrocker 11 лет назад

Thank you so much! This is extremely helpful :-)

@Idklolsendhelp 10 лет назад

Great intro. Thanks

@EmraHemingway 9 лет назад

Bozeman Science What happens when they don't give you the actual OR the predicted yield in a percent yield problem?

@ArashsWorld 9 лет назад

where did 6.19 come from?

@jennahj_ 9 лет назад

It is the actual yield. In a percent yield problem, it should be given to you.

@ArashsWorld 9 лет назад

thatawesomeperson27 Ok thanks

@charityari6523 8 лет назад

hey how did he get 55.2 on the expected product? because when added together it equals 60.

@charityari6523 8 лет назад

+Sarah Mae Fernandez thank you lovely :)

@Slecker95 11 лет назад

Bahhh! Why didn't I find your videos sooner when I was high school chem!!! Oh well at least I can use your videos for college chem and bio hehe ;D

@kianaarem8605 10 лет назад

Consider the following : LiOH + HCL - > LiCl + H2O A) how many moles of HCL are there in 100 ml of a 1M solution B) what mass of LiOH would react with this quantity of HCL ( assume complete reaction and 100 % yield )? C) what mass of LiCl would be produced

@7thfleetpodcast402 5 лет назад

Took him 10 minutes to teach me what my teacher couldn’t in a month.

@carloortega4368 7 лет назад

Where did he get 24.6g ?

@matthewbishop6952 8 лет назад

Very helpful! thank you:)

@AkashThomas99 7 лет назад

Very helpful.Thanks.

@kianaarem8605 10 лет назад

This questionnis for my exam and I cannot figure it out could someone help me please

@charro1775 5 лет назад

Where did you get the 6.19 from?

@pineapplerindm 5 месяцев назад

pretty much random - actual yield can be any percent of expected yield

@joshday2043 7 лет назад

Around 3:14, he puts 18.02 as the molar mass of water. But wouldn't it be 36.04 because there are 2 moles of H20 in the balanced equation? I'm confused please help me.

@matthewcossey9753 7 лет назад

Josh Day it is just the molar mass of H2O not of 2H2O

@Kim-hf2ip 10 лет назад

HOW THE HELL U GET 55?!

@MylensPerspective 3 года назад

@@yahyanouman7024 Legend! Cheers

@henrygramelspacher8443 3 года назад

@@yahyanouman7024 thank yoooooou

@noemiedelhaye5646 7 лет назад

omg so helpful !!! thank you so much

@adoream4291 5 лет назад

you teach me more than my own teacher, he don't explain crap you know who you are mr.H

@emmytul9053 4 года назад

Thank youuuuuu! That was great!

@further4104 8 лет назад

Finals this week

@further4104 3 года назад

@John C Don’t remember what I got but now studying in college so good enough!

@AliumMoAnn 8 лет назад

Oh My Gosh, THANK YOU!!!

@NoLifeActual 10 лет назад

not a real fan of stoichiometry xD

@luvpreetsingh2681 9 лет назад

Very helpful :)

@estringrocker 10 лет назад

Thank you!

@shawn2196 7 лет назад

Literally in the 1st 2 minutes this taught me what my boring ass teacher has failed to teach me for the past 3 weeks

@minpark2664 8 лет назад

You are awesome....

@danielagutierrez5834 3 года назад

chemistry teacher stopped sending us work and now we are watching video to learn

@JossinJax 6 лет назад

Excelente!

@MrBlackPanda007 10 лет назад

Thank you!!!!

@sanjeevshrivastava5927 7 лет назад

thank you

@user-hk1um1kg3h 5 месяцев назад

thank u so much

@PokingTactics 11 лет назад

oh my god i wish i found this channel sooner :|

@romerobryan83 9 лет назад

My teacher says using 22.4 L for any gas is incorrect and we have to use a special equation

@AliumMoAnn 8 лет назад

+romerobryan83 Liters is used for liquids though.

@alexkantor8238 6 лет назад

It's only correct at STP (0C and 1atm)

@iramartyniak5515 9 лет назад

Golden rain reaction as the example =)

@samstrobelight 11 лет назад

I'm curious to where carbon monoxide comes in? I thought all carbon based fuels created CO when reacting with oxygen?

@skullncrossbonesxD 5 лет назад

i just dont get how you got 20.4 from 20? 😭

@maresonestorpe7244 5 лет назад

How come its 16??on which Carbon=12 and Hydrogen =1×2 =2,,..it's 14

@lukedives8575 8 лет назад

Dammit America! This is such a complicated way of doing it. I find that the equations we use are so much simpler and easier. m=nM where m=mass, n= number of moles and M= molar mass. And when doing gaseous equations, V=(n)(22.4). You can manipulate these equations depending on what they ask you to find by using normal mathematical principles for equations.

@reesemaners7992 8 лет назад

+Luke Dives does that really work?

@kyuma401 8 лет назад

+Reese Maners yes it does.

@jaysellers9392 10 лет назад

you rock!

@GoatedWSauce 5 лет назад

thanks buddy

@twc35ga50 7 лет назад

ha, once you learn this stuff. the actual hard stuff comes later!

@fehmikaragoz8210 3 года назад

The answer to the question you gave as 40 liters of H2O in response to your video in the 6th-minute 40th second and the answer in the 7th minute and 50th second is wrong! Because in standard conditions STP is also water liquid. and STP does not work for solids and liquids. STP only works for gases.