How to Find How Much Excess Reactant Remains Examples, Practice Problems, Questions, Summary

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In this video, you'll learn how to find how much excess reactant is left by going through an example together.
The first step is to write a balanced chemical equation is one is not already given. Then, you'll have to figure out which reactant is limiting by convert both reactants into moles and dividing by the coefficients. Then you'll convert the limiting reactant into the grams of the excess reactant to figure out how much was consumed. Lastly, you'll subtract the amount consumed from how much was present initially.
By the end of this video, you'll know exactly how to find how much of the excess reactant remains.
If you liked my teaching style and are interested in tutoring, go to www.conquerchemistry.com/onlin...

Пікірлер: 70

  • @rod2662
    @rod26623 жыл бұрын

    Watching this during my chemistry unit test 🙏

  • @lolae.4562

    @lolae.4562

    2 жыл бұрын

    same haha

  • @aniketdesale494

    @aniketdesale494

    Жыл бұрын

    Savage

  • @Joseph-hf9mi

    @Joseph-hf9mi

    Жыл бұрын

    Exam*

  • @rod2662

    @rod2662

    Жыл бұрын

    @Joseph they called it a unit test I wrote unit test

  • @heelylife

    @heelylife

    Жыл бұрын

    How did you do

  • @tookey2249
    @tookey22493 жыл бұрын

    short, straight to the point video. helped me out within 5 mins

  • @qqqwww-fz9ux
    @qqqwww-fz9ux Жыл бұрын

    Wow. English is not even my language, and yet you're explaining way better than some french people💯thanks and good job👌🏽👍🏽

  • @landonpettit4784
    @landonpettit47843 жыл бұрын

    Dude! You are the freaking MAN! Thank you so much, helps like you wouldn't believe!

  • @LuciKarman
    @LuciKarman Жыл бұрын

    This was perfect. Understood it immediately

  • @jai42636
    @jai426365 жыл бұрын

    Love u sir o finally understood excess reagent

  • @heelylife
    @heelylife Жыл бұрын

    Thank you good sir, my chemistry teacher has been KZread and you are now one of many KZreadr teachers

  • @ninoxxx9695
    @ninoxxx96952 жыл бұрын

    a bit late but he got 1.49 by multiplying 3.5 g of O2 by 1 mol of O2 then dividing it by 32 g of O2 then repeat (remember to cancel out everything except the top right which is the 17.031 g of NH3 for you to come up with grams of NH3 in your final answer)

  • @nc8002
    @nc80024 жыл бұрын

    Can you pls explain gram to gram conversion properly

  • @christineseco5267
    @christineseco5267 Жыл бұрын

    thank you for refreshing my memory!

  • @Jake_E.
    @Jake_E.6 ай бұрын

    Thankyou so much, you saved me 1 day before my test

  • @AliAbdou_7
    @AliAbdou_74 жыл бұрын

    Thank you very much, really appreciate it

  • @shakenbake4164
    @shakenbake41643 жыл бұрын

    How did you get 1.49 ?????I'm so lost there

  • @cakemonster3983

    @cakemonster3983

    3 жыл бұрын

    I was confused too but I found out that you should follow the formula. You multiply and divide the numbers regardless if it is grams or mol

  • @ismaelgamal726
    @ismaelgamal7265 жыл бұрын

    Easy and helpful, thanks

  • @lukecalibo1984
    @lukecalibo19843 жыл бұрын

    How'd you get 1.49 g

  • @christinedu8396
    @christinedu83964 жыл бұрын

    omg bless this video is everything

  • @avocatious6402
    @avocatious64023 жыл бұрын

    Very helpful, thank you

  • @treywrld3240
    @treywrld32403 жыл бұрын

    How did u get 1.49 ?

  • @nureima2020
    @nureima20204 жыл бұрын

    thank youuuuu for this simple explanation ,

  • @veganslayer7114
    @veganslayer71143 жыл бұрын

    love you sir🥺 tomorrow will be my chemistry final test and you help me a lot!

  • @SI.COYG6

    @SI.COYG6

    Жыл бұрын

    how was it

  • @faytoneerlenet.9277
    @faytoneerlenet.92773 жыл бұрын

    THANK YOU SOOO MUCH!!!!

  • @finn_the_human28
    @finn_the_human28 Жыл бұрын

    Watching this while doing my assignment due in the next hour. Tnx

  • @hadidayeh
    @hadidayeh3 жыл бұрын

    amazing job i got the same chemical reaction 😂❤️❤️

  • @christinedominice891
    @christinedominice8913 жыл бұрын

    How did you get the 1.49g, Please I dont know how?

  • @iwachan8420
    @iwachan84203 жыл бұрын

    thankyou sir you made it easy

  • @Yushie
    @Yushie4 жыл бұрын

    ALL THE OTHER VIDEOS DO SOME WIERD SHIT AND DONT EXPLAIN< BUT YOU, YOUR A LEGENDDDD

  • @renzgamo4477
    @renzgamo44772 жыл бұрын

    How did you get the 1.49g

  • @jhonalbertcollens3804
    @jhonalbertcollens38042 жыл бұрын

    Explanation is just a quick but amazingly did it well and more informative than I expected!!

  • @maryamtayeh4871
    @maryamtayeh48715 жыл бұрын

    thanks this was easy to follow!

  • @natalietucker4364
    @natalietucker43643 жыл бұрын

    What if it’s in moles and not grams?

  • @landoh3608
    @landoh36082 жыл бұрын

    Thank youuuu

  • @aphiwemthembumani7494
    @aphiwemthembumani74943 жыл бұрын

    God bless you sir

  • @user-gu1ws7ck7r
    @user-gu1ws7ck7r9 ай бұрын

    Oh how did you get the 17.031?

  • @rishankyaduvanshi1443
    @rishankyaduvanshi1443 Жыл бұрын

    From India🇮🇳

  • @anthony_madi
    @anthony_madi2 жыл бұрын

    life saver

  • @arakita9308
    @arakita93083 жыл бұрын

    Is it possible to calculate for the excess amount of excess reagent if the problem only include the mass of only one reactant?

  • @jaysondebrah8359

    @jaysondebrah8359

    2 жыл бұрын

    Find the mass of the other one

  • @wawint.2106
    @wawint.21063 жыл бұрын

    U saved meeeeeeeee

  • @qqqwww-fz9ux
    @qqqwww-fz9ux Жыл бұрын

    1:02

  • @aidinvlogz5512
    @aidinvlogz5512 Жыл бұрын

    Ty

  • @callumlovelace2905
    @callumlovelace29054 жыл бұрын

    I finawy figuwed out how to do dis

  • @tsuzenomead303
    @tsuzenomead3034 жыл бұрын

    can I directly cut from their mols instead? I mean by the mol of excess minus the mol of limiting, to find the excess mass...?

  • @senthilpuliadi6599

    @senthilpuliadi6599

    2 жыл бұрын

    No u can't

  • @annasangels6799
    @annasangels6799 Жыл бұрын

    how do you calculate on the calculator to get 1.49 im lost

  • @carelessbear800

    @carelessbear800

    11 ай бұрын

    multiply straight across and divide by the bottom 3.5g O2 / 32g O2 = 0.107 (0.107 x 4 )/ 5 = 0.0856 0.0856 x 12.031 = 1.49g NH3 how i remeber its like a zig zag. diviide given mass by its molar mass. Then multiple and divide by the mole ratio (multiple by numerator first then divide by denominator) and finally multiple by the grams. (dont really need to divde by 1. its a given what ur anwser would be) hope this helps anyone

  • @itsme-nq1st
    @itsme-nq1st9 ай бұрын

    30 minutes till my chemistry midterm

  • @itsjaaassss5187
    @itsjaaassss51872 жыл бұрын

    Thank you so much 🤍🌷

  • @opufy
    @opufy10 ай бұрын

    i wonder what youre up to these days? engineer? MD?

  • @people_of_pez2532
    @people_of_pez25322 жыл бұрын

    Everything in blue here is unnecessary. The only thing it can be used for is determining WHICH is the excess/limiting reactant. It gives no data of any real value later on. You can also determine WHICH is the excess reactant by just starting with everything that he wrote in purple. Compare the amount of NH3 "Consumed" when reacting with 3.5g O2 (1.49g NH3) to the amount of NH3 given in the experiment (3.25g NH3). The amount consumed is less than the amount given in the experiment, thus some of the NH3 would be left over. Thus it would be the excess reactant. This saves time because it identifies which reactant is in excess, as well as giving you real numbers that can be used to determine how much in excess the reactant actually is. Edit: I do realize that for someone being introduced to the topic, your way is probably better for them to learn. On a test however, especially a test on stoichiometry, this would be burning time that you really don't have.

  • @supermarinespitfire3760
    @supermarinespitfire37602 жыл бұрын

    watching 5 hrs before Chem exam fml

  • @bendyaerial5940
    @bendyaerial59404 жыл бұрын

    3.5 x 1/32 x 4 /5 x 12.031 / 1 = 1.053g NH3 am I wrong here?

  • @bendyaerial5940

    @bendyaerial5940

    4 жыл бұрын

    sorry, 17.031 actually looks like 12.031

  • @meddlemedley740

    @meddlemedley740

    4 жыл бұрын

    @Bendyaerial he meant 17.031 but prob wrote the number like 2 on accident

  • @Manuxe

    @Manuxe

    2 жыл бұрын

    @@meddlemedley740 17.031 is a molar mass of what?

  • @ramonaparicio6989
    @ramonaparicio69894 жыл бұрын

    Goat

  • @franciswiredu9410
    @franciswiredu94102 жыл бұрын

    Great video. I was lost at the point where you had the 1.49g of NH3. That calculation is supposed to give 1.053g of NH3

  • @friendlytutor8891

    @friendlytutor8891

    2 жыл бұрын

    I think you mistook 17.031 as 12.031. he was using 17.031 because that is that molar mass of NH3 :)

  • @praveenamathur8934
    @praveenamathur89344 жыл бұрын

    Very poor explanation

  • @christinedominice891
    @christinedominice8913 жыл бұрын

    How did you get the 1.49g, Please I dont know how?