STOICHIOMETRY - Limiting Reactant & Excess Reactant Stoichiometry & Moles

STOICHIOMETRY - Limiting Reactant & Excess Reactant Stoichiometry & Moles - A video showing two examples of how to solve Limiting Reactant stoichiometry problems. This video also explains how to determine the excess reactant too. Stoichiometry can be a difficult concept, tune in to see how easy it can be.

Пікірлер: 224

  • @vertigo0331
    @vertigo03319 жыл бұрын

    That's fucking great.. 6 minutes in before I realized you are never going to explain what I needed explained.

  • @LazazDimirmastermind

    @LazazDimirmastermind

    6 жыл бұрын

    same

  • @sarahtaylor3345
    @sarahtaylor33458 жыл бұрын

    You explained in 12 minutes what my teacher couldn't teach in an hour. Thank you so much for making these videos!

  • @carolynflannery3393
    @carolynflannery339311 жыл бұрын

    You. Are. Amazing. After 50 videos, yours is the one that saved me, you have no idea how much I love you right now.

  • @melleynflores7937
    @melleynflores793710 жыл бұрын

    Omg thank you I was going into my exam clueless but now everything is so much clearer thank you!!

  • @taushabrazier1
    @taushabrazier111 жыл бұрын

    Chem 111 in the summer, ugh! Great example! I have a test Monday so I'll be tuning in again. Much better than my professor. Thanks!

  • @cjt0123
    @cjt01239 жыл бұрын

    Thanks! I really appreciate anyone who takes the time to create videos like these

  • @sciencepost

    @sciencepost

    9 жыл бұрын

    cjt0123 Thanks. It's really cool to hear that it helps. Best wishes learning.

  • @ChildOnRampage
    @ChildOnRampage9 жыл бұрын

    I have a test in a few hours, THANK YOU SOO MUCH! I literally had no idea how you do this

  • @thegame461
    @thegame46111 жыл бұрын

    Thank you so much! My chem teacher only did two problems on the board real quick, and then told us if we did'nt understand it, we have to look up tutorials on you tube. You are way better than her! You saved us all

  • @jerardyu9677
    @jerardyu967710 жыл бұрын

    Love it! and you too! I don't know why my chem teacher can't just explain this stuff in the simplest way like you did. Great job! Thank you!

  • @sciencepost

    @sciencepost

    10 жыл бұрын

    Kudos to you bro for tuning in and taking the time to learn! Love it! Here's some advice dude, never quit and always be awesome!

  • @kodisanders7057
    @kodisanders70577 жыл бұрын

    This was very helpful! I forgot how to calculate limiting reactants for my summer assignment and this problem was driving me insane. Thank you so much!

  • @summerk8190
    @summerk819010 жыл бұрын

    helped so much more than the other videos of stoichiometry! thanks!

  • @hummospita
    @hummospita11 жыл бұрын

    i'm strugging big time with stoichiometry. you explain everything so well. thank you!!!!

  • @grizzybroable
    @grizzybroable10 жыл бұрын

    I have been using your videos for a while now, i can truly say that i have never learned so much in a short amount of time. :) thanks Mr post

  • @sciencepost

    @sciencepost

    10 жыл бұрын

    Hey Bryan, that was a really nice compliment. Thanks. Please continue to be awesome and dominate your tests!

  • @sciencepost
    @sciencepost11 жыл бұрын

    Kylie, thx for the compliment. There is no way to get this after 2 examples. Good job tuning in. If the video helped, please share it with a friend. Tune in again when you get lost in the sauce. Peace.

  • @barakathnisha9114
    @barakathnisha911410 жыл бұрын

    I took really long to understand this particular part but now i understood! Thanks for this video! It helped me! :)

  • @sciencepost
    @sciencepost11 жыл бұрын

    Glad to help. The concept can be difficult to explain sometimes, but I'm glad you caught on! Congrats on learning a tricky topic.

  • @riggidyrickt7574
    @riggidyrickt75749 жыл бұрын

    Thanks a lot it seems like you know everything except how enlightened i am everything's just so clear to me everything makes sense

  • @matthewsulka1356
    @matthewsulka13568 жыл бұрын

    Thanks so much man! You explained everything perfectly and now I understand!

  • @premiergymnasticslexi3091
    @premiergymnasticslexi309112 жыл бұрын

    Okay, ur my hero:)))) I'm really struggling with this unit and ive looked up every video for this stuff but yours was the only one that really clicked, it was really clear through out the whole video THANKSSSSSSSS:)

  • @dimibrije7302
    @dimibrije73029 жыл бұрын

    Thank you very much. Excellent explanation and brilliant working.

  • @seashadowed
    @seashadowed10 жыл бұрын

    Can't thank you enough for these videos... they have helped tremendously.

  • @sciencepost
    @sciencepost11 жыл бұрын

    Thx for the compliment Carolyn! I try to keep it simple, and I hope you go big on your test!

  • @Cha27Cha
    @Cha27Cha10 жыл бұрын

    This was so great! I feel so much better now that I understand it. The hot dog explanation really helped me understand the general idea. Thank You so much :)

  • @sciencepost

    @sciencepost

    10 жыл бұрын

    That's great to know that the good old hot dog analogy worked! I'm so stoked that it all has clicked. Keep up the good work and always be awesome!

  • @Cha27Cha

    @Cha27Cha

    10 жыл бұрын

    sciencepost Thank you! You are so kind :D

  • @sciencepost
    @sciencepost11 жыл бұрын

    Hey Zach, thanks for tuning in, I'm truly stoked it helped. Peace.

  • @CourtneyLuvsTilly
    @CourtneyLuvsTilly10 жыл бұрын

    Thank you so much! I can't believe I thought this was so hard when it is really easy! I am emailing this to my friend!

  • @sciencepost

    @sciencepost

    10 жыл бұрын

    Thanks for your feedback! I'm so glad it clicked and sharing the video!

  • @betomoris7282
    @betomoris72829 жыл бұрын

    KZread always saving my a$$ before an exam... Thanks sciencepost keep it up !

  • @sciencepost

    @sciencepost

    9 жыл бұрын

    Beto Moris I love to hear that the vids keep helping people like you out. Keep coming back for more and never quit on learning!

  • @mollie7684
    @mollie768411 жыл бұрын

    I wish i knew about this channel earlier in the school year! everything is starting to make sense now (only took about nine months :/)

  • @jeanniegauldin7397
    @jeanniegauldin73979 жыл бұрын

    Thank you so much! Much easier than what my instructor taught. Makes sense now. whew!

  • @sciencepost

    @sciencepost

    9 жыл бұрын

    Jeannie Gauldin Sounds like the light bulb went off. That's awesome. Keep up with it and I'm sure you'll do well.

  • @jeanniegauldin7397

    @jeanniegauldin7397

    9 жыл бұрын

    Thank you. I sure hope so because I have been struggling. And you have to understand what you are doing before you can move forward in chemistry.

  • @abigalelawrie5633
    @abigalelawrie56339 жыл бұрын

    how did you get the 22.4l as the bottom half of the second reaction shown.. a bit confused to how you get 22.4l

  • @swayswagg4644
    @swayswagg46449 жыл бұрын

    thanks! I finally understand!! though it took me a minute after the video to absorb it all. nice2

  • @nhunghaa
    @nhunghaa11 жыл бұрын

    Thank you very much! This was more help than my chem teacher

  • @matheusmairamaira3984
    @matheusmairamaira39847 жыл бұрын

    i find it useful to see these lecture on youtube.

  • @caitlynbell2302
    @caitlynbell23028 жыл бұрын

    So to get the 130g for the max amount of CaO made from 37.1g of oxygen... Did you multiply 64.96 (Moles of O2 x formula mass of CaO) by 2, since we are looking for the amount of O, rather than O2?

  • @M00ND0UGH
    @M00ND0UGH8 жыл бұрын

    Great Video! Helped a lot.

  • @SamSreca
    @SamSreca7 жыл бұрын

    Thank you so much, helped me pass my test

  • @ibensince2
    @ibensince210 жыл бұрын

    THANK YOU SO MUCH BRO! HELPED A LOTTTTTTTTTTTTTTTTTTT.

  • @sha6089
    @sha608910 жыл бұрын

    umm, quick question. O2 started in Liters, how did it end up in grams? and is 22.4L converted from 16g?

  • @sciencepost
    @sciencepost11 жыл бұрын

    That's a great compliment. Keep up the learning, tune into my other videos if needed. Peace.

  • @MsChocolisious
    @MsChocolisious11 жыл бұрын

    This is a really helpful video!! thanks a lot!

  • @maxifitness7526
    @maxifitness752611 жыл бұрын

    Perfect example with HOTDOGS! Thnx bro

  • @annali9630
    @annali963010 жыл бұрын

    great explaining! very clear thanks so much for the help :)

  • @rachelmarie1019
    @rachelmarie10198 жыл бұрын

    this helped so much bless your kind soul

  • @youngkingswager
    @youngkingswager10 жыл бұрын

    What do you add together get the ending number

  • @sciencepost
    @sciencepost11 жыл бұрын

    Stoked to help. Best wishes on your final.

  • @teletsuo
    @teletsuo11 жыл бұрын

    You sir, are awesome. Thank you very much!!!

  • @baronchadwick7254
    @baronchadwick72549 жыл бұрын

    how did you know what numbers to put in for the balancing

  • @Abhinair66
    @Abhinair6610 жыл бұрын

    Great explanation!

  • @angellkm
    @angellkm11 жыл бұрын

    thank you so much!! this was really helpful!!

  • @Winner12343
    @Winner1234310 жыл бұрын

    Thank you for the video is was a GREAT help!

  • @sciencepost

    @sciencepost

    10 жыл бұрын

    That's awesome to hear. This topic is not easy. If you just got it, that is sweeeeet.

  • @sciencepost
    @sciencepost10 жыл бұрын

    You are totally welcome! Keep up the great effort!

  • @aaaaammmmmyyyyyy
    @aaaaammmmmyyyyyy9 жыл бұрын

    helped me alot! thanks! great explanation

  • @DreseBabe
    @DreseBabe11 жыл бұрын

    this helped me so much , thank you :)

  • @moniquemartinez4036
    @moniquemartinez40363 жыл бұрын

    Great video!

  • @tstandsforturbo
    @tstandsforturbo11 жыл бұрын

    if i were to find the difference between the E.R. and the L.R. then reverse the molar conversion step would that give me the amount of E.R.?

  • @mariagabriela8730
    @mariagabriela873011 жыл бұрын

    Yea I found the video! You're very helpful thank you

  • @rickyshakti3918
    @rickyshakti391811 жыл бұрын

    wow this helped me a lot ....tnxxx a lot dude

  • @arsalanawan97
    @arsalanawan977 жыл бұрын

    great video keep it up

  • @tifftiff233
    @tifftiff23311 жыл бұрын

    Thank you so much! You just saved me! If I ever have a pop quiz on this, I'm sure that I'll ace it! Thank you!!! ^_^

  • @music__enjoyer
    @music__enjoyer10 жыл бұрын

    THIS VIDEO SAVED MY LIFE

  • @sciencepost

    @sciencepost

    10 жыл бұрын

    So cool to hear!

  • @MarkArandjus
    @MarkArandjus11 жыл бұрын

    Haha, I already understand this, but the hot dog thing is really clever and easy to understand!

  • @TheDaniel7310
    @TheDaniel731011 жыл бұрын

    wait, howd you get the 24.33 and the 22.4?

  • @FadiCharif
    @FadiCharif11 жыл бұрын

    You really saved my ass, man. Thank you so much.

  • @justin11scott13
    @justin11scott136 жыл бұрын

    what do u do to find the answer of 49.1????

  • @Shefaliiiii
    @Shefaliiiii11 жыл бұрын

    how exactly do you find the amount of the excess reactant that is unreacted? it is one of my chemistry problems..

  • @vovologo
    @vovologo11 жыл бұрын

    6:03 how did u get 40.3 for MgO?

  • @maekiok231
    @maekiok2316 жыл бұрын

    Where did u get liter equivalent of o2

  • @lilperfect87
    @lilperfect8710 жыл бұрын

    only at STP (Zero degrees Celcius, 1 atm) though correct??

  • @vpizzuti96
    @vpizzuti9611 жыл бұрын

    thank you very much!! now i can pass my chemistry final! haha

  • @sciencepost
    @sciencepost11 жыл бұрын

    Im stoked it worked bro!

  • @wearethewearethewearethhe
    @wearethewearethewearethhe10 жыл бұрын

    Shouldn't 130 in the last problem have a decimal point afterwards to keep three significant figures in the answer?

  • @sciencepost
    @sciencepost11 жыл бұрын

    Awesome! Do well on your test.

  • @LuisSantos-eq4xj
    @LuisSantos-eq4xj11 жыл бұрын

    How Do i use this when doing grams to mole to mole to grams

  • @sciencepost
    @sciencepost11 жыл бұрын

    No you are awesome! Really sweet observation!

  • @mr_j_official
    @mr_j_official9 жыл бұрын

    Thanks for the help! My Chem Teacher won't kill me now!

  • @sciencepost

    @sciencepost

    9 жыл бұрын

    Mr. Independence EDM That's good news!

  • @sciencepost

    @sciencepost

    9 жыл бұрын

    Mr. Independence EDM Check out my stoich playlist kzread.info/head/PLNc_BreVXbmoiQaQnunBX5CvZL7-aM1XQ

  • @user-rn5lb3gr6z

    @user-rn5lb3gr6z

    9 жыл бұрын

    I Know!! Huh!

  • @stonedpebble26
    @stonedpebble2611 жыл бұрын

    where did the 40.3 come from?

  • @wiskyBOY123
    @wiskyBOY12311 жыл бұрын

    I would like to know is how did you get 22.4L of O2 when you just only know the Litters of O2. Is there a method to get 22.4L of O2 of just having Liters of O2 and nothing else? I'd like a response, this really helped me a whole lot in understanding this section of chemistry, it's just that part that I asked just confused me a little.

  • @thebarelotus
    @thebarelotus10 жыл бұрын

    I may be looking at this wrong but how are you getting 22.4 if Oxygen has an atomic mass of 16.00? This should mean that the first conversion is 1molO2/32gO2, right? Please elaborate on your conversion. Thank You.

  • @killz13xxxx
    @killz13xxxx11 жыл бұрын

    7:27 how u get 22.4?????

  • @Azure491
    @Azure49111 жыл бұрын

    since O2 is alone wont it be like 2 mol O instead of just 1 mol O2?

  • @jacquelinehoogervorst6389
    @jacquelinehoogervorst638910 жыл бұрын

    Great review, thanks ;)

  • @duty_boy3047
    @duty_boy30478 жыл бұрын

    Thanks helped a lot!

  • @kkevinparkk
    @kkevinparkk11 жыл бұрын

    this is great!

  • @mikehawk322
    @mikehawk3228 жыл бұрын

    this helps alot!!!

  • @riyakhan4731
    @riyakhan47316 жыл бұрын

    Need a bit more explanation ! How did you get 24.3 g , 40.3g and 22.4 ? How would we know that ? Reply please .Regards

  • @sciencepost
    @sciencepost11 жыл бұрын

    Lol! I love hearing this kind of stuff. Keep up the learning.

  • @rismish
    @rismish11 жыл бұрын

    how can we find it? or it would be given during MCAT exam?

  • @sciencepost
    @sciencepost11 жыл бұрын

    Hey bro, thanks for the keen eye. In the first example, oxygen was given in liters so I used 22.4L per mole. Hope that helps.

  • @pinoyian7462
    @pinoyian746210 жыл бұрын

    Why didn't you put 31.9988=32g (16x2) on Oxygen like what you did on Mg 24.3g (6:08 part of the video)

  • @beckyboyd6418
    @beckyboyd641811 жыл бұрын

    How do i balance the equation?

  • @aliirayn6275
    @aliirayn62758 жыл бұрын

    man thank you so much!

  • @McFatigueN
    @McFatigueN11 жыл бұрын

    Thanks this helped alot now im not gonna fail my test tomorrow

  • @shelleyfitzsimmons3667
    @shelleyfitzsimmons366711 жыл бұрын

    So how does O2 go from 32.0 g to 22.4 L? Would be nice to show that to us newbies

  • @sciencepost
    @sciencepost11 жыл бұрын

    Picture this, when you are given a length in feet, such as 6 feet, and are asked to convert to inches, what do you do? You would use a conversion factor such as 12 in = 1 ft. The key is that you need a conversion factor! When you are given the volume of a gas in liters, such as 20 L as the video shows, you need to convert that out of Liters and into moles. In order to convert it, you need a conversion factor.

  • @class.clown1127
    @class.clown11278 жыл бұрын

    wait don't u have to convert liters to grams on the second stochiometry problem

  • @bobyay932

    @bobyay932

    3 жыл бұрын

    there is a stoichometry formula used to convert L to grams

  • @sciencepost
    @sciencepost11 жыл бұрын

    Hey Mollie. I'm proud of you for your desire to learn and I'm stoked my teaching style matches your learning style. Best wishes on your exams. Tune in again.

  • @sciencepost
    @sciencepost11 жыл бұрын

    Glad to teach you

  • @Funkymuffins123XP
    @Funkymuffins123XP10 жыл бұрын

    @Alexis Rivera that would only work if it was in grams, but its 20L. The conversion factor between moles and litres is 22.4L/mol at STP. however, the question did not specify that the O2 was gaseous, or that it was at STP, thus the question is done incorrectly. Just little things, but watch out for things like that on a test.

  • @lizbethcaceres0824
    @lizbethcaceres08249 жыл бұрын

    Thank You! well explained!

  • @sciencepost

    @sciencepost

    9 жыл бұрын

    Lizbeth Caceres I'm glad it helped. Thanks for the feedback.

  • @Yes_2fitness
    @Yes_2fitness11 жыл бұрын

    this was helpful :)

  • @ashleyojeda2912
    @ashleyojeda29125 жыл бұрын

    Why is the 2 placed, can't it just stay as one