Stoichiometry

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Stoichiometry

Рет қаралды 342,800

11 жыл бұрын

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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Music Attribution
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.wikimed....
File:Balanced Scales.svg, n.d. commons.wikimed....
File:Bunsen Burner.jpg, n.d. commons.wikimed....
"File:Carbon Dioxide 3D Spacefill.png." Wikipedia, the Free Encyclopedia. Accessed August 22, 2013. en.wikipedia.or....
File:Flametest--.swn.jpg, n.d. commons.wikimed....
"File:Methane-3D-space-filling.svg." Wikipedia, the Free Encyclopedia. Accessed August 22, 2013. en.wikipedia.or....
"File:Water Molecule 3D.svg." Wikipedia, the Free Encyclopedia. Accessed August 22, 2013. en.wikipedia.or....
Michou311. Français : Stickman, February 18, 2012. Own work. commons.wikimed....
Ulflund. English: Space-filling Model of the Oxygen Molecule (O2) Created with Jmol (chemapps.stolaf..., July 18, 2012. Own work. commons.wikimed....

Пікірлер: 175

@26b-tembliquealexis73 5 жыл бұрын

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.

@faustus2058 7 жыл бұрын

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 жыл бұрын

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

@mattpletkovic9441 9 жыл бұрын

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 жыл бұрын

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

@rod.rigohh 4 жыл бұрын

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

@slyassassinxx4466 4 жыл бұрын

well your wish came true

@DianeSteele 4 жыл бұрын

Didnt age well, friend

@tthomas2348 4 жыл бұрын

So this is your fault huh

@downstreamthoughts 9 жыл бұрын

Wow after 2 years of college, and a bit of frustration with Chemistry, I find a free site on KZfaq 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 жыл бұрын

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

@angelahedderick2644 5 жыл бұрын

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 жыл бұрын

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

@gracestelmach291 5 жыл бұрын

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

@thelitpewdiepie3275 7 жыл бұрын

Thats it, im working at mcdonalds😂

@RANDOMGUY2101 6 жыл бұрын

but stoich is one of the easier things in chem?

@abbyhoneywaffles 3 жыл бұрын

@@RANDOMGUY2101 not for some people?

@blusnoartofficial8665 3 жыл бұрын

I'll just stay where I am 😂😂

@voidpriestess8339 3 жыл бұрын

@@RANDOMGUY2101 that is a very subjective statement good sir

@joshbarrett4138 4 жыл бұрын

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.

@saturn1413 5 жыл бұрын

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

@starrw1041 10 жыл бұрын

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!

@nightfox380 8 жыл бұрын

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

@deepcoma898 6 жыл бұрын

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 6 ай бұрын

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

@katelynwinge7187 8 жыл бұрын

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

@amitgodara6985 9 жыл бұрын

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

@RamenSploosh 9 жыл бұрын

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

@tattooed_nana7363 5 жыл бұрын

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

@stuartnan9787 5 жыл бұрын

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)

@johnbingham6355 4 жыл бұрын

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

@TVMythic 8 жыл бұрын

One of your best videos, in all honesty

@mmeyarham4095 6 жыл бұрын

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

@Celestial.moon. 9 жыл бұрын

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 жыл бұрын

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

@yungpoptart 7 жыл бұрын

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

@RichardGarber 11 жыл бұрын

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...

@madisenbailey8013 9 жыл бұрын

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

@Eli-ns5uw 9 жыл бұрын

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

@paulcrozier405 9 жыл бұрын

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

@arbab2569 5 жыл бұрын

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

@akaijahr8219 4 жыл бұрын

@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?

@nathanbucolo2191 9 жыл бұрын

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

@Daniel-fb1qd 10 жыл бұрын

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

@klaitor55 10 жыл бұрын

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

@joshday2043 7 жыл бұрын

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 жыл бұрын

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

@nataliep5545 8 жыл бұрын

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?

@mumu6880 6 жыл бұрын

happy teacher' day Mr . Anderson!!!

@Soma2501 8 жыл бұрын

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)

@user-zr3wr7oe5p 10 ай бұрын

What a great explanation

@valfastenau3891 9 жыл бұрын

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

@7thfleetpodcast402 5 жыл бұрын

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

@kianaarem8605 10 жыл бұрын

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

@further4104 8 жыл бұрын

Finals this week

@further4104 3 жыл бұрын

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

@ArashsWorld 9 жыл бұрын

where did 6.19 come from?

@jennahj_ 9 жыл бұрын

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

@ArashsWorld 9 жыл бұрын

thatawesomeperson27 Ok thanks

@its_EZ 11 жыл бұрын

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

@Slecker95 11 жыл бұрын

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

@Kim-hf2ip 10 жыл бұрын

HOW THE HELL U GET 55?!

@MylensPerspective 4 жыл бұрын

@@yahyanouman7024 Legend! Cheers

@henrygramelspacher8443 3 жыл бұрын

@@yahyanouman7024 thank yoooooou

@fehmikaragoz8210 3 жыл бұрын

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.

@brandomalqui2097 9 жыл бұрын

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

@thepandagirl96 11 жыл бұрын

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

@sarahcall7977 8 жыл бұрын

This is so helpful 🙌

@nicholaskhawli8435 4 жыл бұрын

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

@YazminAbat 4 жыл бұрын

Excellent foundations explanation. Keep it up :))

@leashamehta7670 10 жыл бұрын

thank u for saving my life

@hemanivetytha4679 7 жыл бұрын

wonderful explanation

@Ryan-su7vt 7 жыл бұрын

thanks man! very helpful.

@lwaheeba 11 жыл бұрын

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.

@NewPSCity 10 жыл бұрын

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

@charro1775 5 жыл бұрын

Where did you get the 6.19 from?

@pineapplerindm 6 ай бұрын

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

@hs3545 3 жыл бұрын

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

@charityari6523 8 жыл бұрын

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

@charityari6523 8 жыл бұрын

+Sarah Mae Fernandez thank you lovely :)

@EmraHemingway 9 жыл бұрын

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

@Hababadababa 9 жыл бұрын

I love you , you're so kinda for helping

@Idklolsendhelp 10 жыл бұрын

Great intro. Thanks

@adoream4291 5 жыл бұрын

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

@shawn2196 7 жыл бұрын

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

@NoLifeActual 10 жыл бұрын

not a real fan of stoichiometry xD

@haydenbradley382 6 жыл бұрын

This helped a ton, thanks

@AkashThomas99 7 жыл бұрын

Very helpful.Thanks.

@user-hk1um1kg3h 5 ай бұрын

thank u so much

@danielagutierrez5834 3 жыл бұрын

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

@yonatan0910 8 жыл бұрын

thanks it really helps a lot

@emmytul9053 4 жыл бұрын

Thank youuuuuu! That was great!

@kakerlake650 11 жыл бұрын

i really like your videos keep it up :)

@estringrocker 11 жыл бұрын

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

@matthewbishop6952 8 жыл бұрын

Very helpful! thank you:)

@nonoparletrop 7 жыл бұрын

omg so helpful !!! thank you so much

@kianaarem8605 10 жыл бұрын

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

@trumans.7106 8 жыл бұрын

how did he get the actual yield?

@saboot.a8640 4 жыл бұрын

8:51 what does soln mean?

@AliumMoAnn 8 жыл бұрын

Oh My Gosh, THANK YOU!!!

@minpark2664 8 жыл бұрын

You are awesome....

@lukedives8575 8 жыл бұрын

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 жыл бұрын

+Luke Dives does that really work?

@kyuma401 8 жыл бұрын

+Reese Maners yes it does.

@estringrocker 11 жыл бұрын

Thank you!

@luvpreetsingh2681 9 жыл бұрын

Very helpful :)

@sanjeevshrivastava5927 7 жыл бұрын

thank you

@carloortega4368 7 жыл бұрын

Where did he get 24.6g ?

@romerobryan83 9 жыл бұрын

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

@AliumMoAnn 8 жыл бұрын

+romerobryan83 Liters is used for liquids though.

@alexkantor8238 6 жыл бұрын

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

@JossinJax 7 жыл бұрын

Excelente!

@PokingTactics 11 жыл бұрын

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

@MrBlackPanda007 10 жыл бұрын

Thank you!!!!

@maresonestorpe7244 5 жыл бұрын

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

@GoatedWSauce 5 жыл бұрын

thanks buddy

@samstrobelight 11 жыл бұрын

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

@iramartyniak5515 9 жыл бұрын

Golden rain reaction as the example =)

@twc35ga50 7 жыл бұрын

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

@lianovic1187 2 жыл бұрын

when the ap chem teacher dont feel like teaching ap chem

@litojonny 11 жыл бұрын

I FUCKING LOVE STOCIOMETRY

@lordspotato5032 2 жыл бұрын

jesus that one diagram saved me hours

@TheNotSoRealJeff2 Жыл бұрын

You are John Green.

@aleemashraf2343 7 жыл бұрын

Why can't you be our chemistry teacher? Didn't learn shit from mine the whole year bout to fail the final along with my whole class 😑