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IGCSE CHEMISTRY REVISION [Syllabus 4] - Stoichiometry
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- Äas pĆidĂĄn 18. 08. 2024
- Hey guys, this video is designed to simplify stoichiometry calculations! I remember back when I was studying IGCSEs this topic really made me confused. I hope this video gives you some extra confidence!
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ERROR CORRECTION
2:48 Lithium is +1 not -1
10:16 20 grams of MgO is 20/40 *not* 20/80.
Thank you ... I thought I didn't understand
11:38 the equation should be: mg + œ O2 ----> mgO
considering the fact that the mass of magnesium is taken as 24 instead of 48 (which is the mass of 2mg)
you should probably pin this comment if you want people to see it. rly great video though : )
@@thehudakhan that can even be 2mg + o2 = 2mgo right???
Pin this pls I thought I was dumb lmfao
hahaha my exam is in two hours :)
Clara SanchĂs how was it
Stop capping
@@emmanuelthwala2809 lmao
Lmao... I am getting flashbacks of my own IGCSE....for clarification I am an A level student now
sia sia sameeee hahahaha
i love how he says "please understand" like im not trying to already
I'm here for last minute prep and my man is telling me about constant practice
I love this you explained to me in 18 mins what my teacher couldnât teach in 1 year
that means you weren't paying attention when your teacher was explaining.So sad
@@rishizaveri5252 Untrue. It is very possible for someone to just have a bad teacher.
@@dhruv3726 well then u might be having a bad teacher coz I didnt have
@@rishizaveri5252 thats why that person specified saying 'my teacher'
@@sandalibhagya5875 mam do u see how many months back i commented here lol
Thank you so much for explaining this chapter. I considered this the hardest chapter in chemistry until I watched your video.
Awesome stuff, thanks Astrid for the support!
until you find organic chemistry
@@sumrathsingh5409 fax lmao
Broooo tbh u r the best teacher on utube
Tchrs cant explain it properly but u did it just in 18 mins
I understood everything very clearly
Thx bro
THANK YOU SO MUCH. I had no idea what I was doing learning this topic during online school but this video explained it so simply
my exams got cancelled TwT, but thank you for helping me through the tests that my school gives me every two weeks or so :). I shall use this information wisely and study for A level
awww your pfp so cuteeeee! doggos have my heart
Were u refunded?
wish me best of luck for my exams and give me some tips plz
you are great keep uploading videos
Hard work
Hope you did well đâ€ïžI have my exams In a few weeks
Lauda
U r a bloody legend bro. Thank you so much! There's soo much in the tb and u just simplified all of it for me, making my work so much easier!
right honestly ever since like 2017 (the clickbait start) i legit never like subscribe or anything to random videos i watch but, u were so down to topic so straight forward, correct title, correct picture of video, nothing was a lie, so i subscribe very good sir
Great video sir! I have an exam tomorrow and this cleared it all, that too at the eleventh hour! I am obliged to your sweet service!âšđđ
I have my final exam on Monday and this man just explained to me what my teacher couldn't do in 2 years
Good luck!!
Thank you so much.
You made chemistry topics lot easier comparing to my school teachers.
Thank you this is so good. You made it so easy. I feel so confident. Imma recommend this to more of my friends!!
me to! all the best
Words canât explain how much you save my grades, may you blessed your so kind, and notes for free??!? Bless your soul đ
Videos like this make learning much more easier. Thank you soo much for the amazing explanation.
This really helped me! Now I understood what the real concept is. Finally! And my exam is in 1 hr nd 35 mins. Thank you so much I'm totally confident about this!! Thank you
How did your exam go?
@@minvs I passed! Now I'm doing my a levels :D
@@slaymyselffr5805 Ayyy! That's great :D I hope it's going well!
@@minvs thankoo! đđ„°
why does he pronounce www
like dot dot dot
0:11
this was honestly really helpful, but i just wanted to ask that why haven't you covered about empirical formula in this video. Isn't that also included in stoichiometry?
Thank you so much!!!! You have no idea how much this video helped me...also I recommend everybody to check out the notes shared...they will help too
Great refresher for me for a quite complicated topic. I understood your explanation well and now I will go and solve some more practice questions. Thank you!
Learnt this today! Can't wait to watch the vid.
I have exams tmr and I can't begin to understand a word in Chem
Cambridge in 20 minutes! Hahahaha đ
Thank u soo much for this. U simplified everything and I can understand it. Great video.
lol, i am watching this again 1 year later and i understood it thanx
fun fact: I studied this from an answer of an example question that I got from a good friend but since she didnât explain anything further and I just take in whatever her example shows, I came to the exam thinking all ratio of reactants and products being 1 : 1 which definitely isnât and got everything wrong :â) now I watch this video a bit too late and flunked my other exam which is disappointing af but I still have 2 more chem papers hopefully I can ace those ones. ps. Ik itâs technically not her fault or responsibility to teach me and that I fail, itâs just that timing of everything going on for me was so off, and because if the roles were switched ik I would have go far and beyond to make sure she understands so itâs just a little sad, plus more or less Iâm more frustrated with myself and the universe because if I wouldâve asked about the ratio Iâm sure she wouldâve told me too but I didnât
I hope your other papers went well.
@@azura4166 tysm!!
Imagine having free lessons and still failđđthese kind of opportunities you have to use them to pass your exams wellđâ€anyways thank you bro for the lesson you are the best teacher i am in grade 10 and this topic was really difficult to understand at schoolđđđ
wow!! i finally understood mole calculations!! thank you!!
YOU MADE EVERYTHING SO EASYYYđđđđ
in the last equation why did we divide instead of multiplying cuz the formula is moles=concentration [multiply] volume
Tq I have exam tomorrow and this really helping me. I can understand it easier than how my teacher explain it
Thank you so much. I have an exam in less than an hour and this seemed like the most difficult topic but not anymore
I have never in my life likes a video but this one, YES.
Chemistry really made easy đ†thanks alot đ
In 2:47 you mentioned that the charge would be -1 (negative one) so I have a query...Will the charge not be +1(positive one) instead of -1(negative one)? As there would be more number of protons than electrons as 1 electron would be removed for lithium....btw your videos are really helpful for many igcse candidates including myself so keep up the amazing workđ„°
Yeap! Please refer to pinned comment âerror correctionâ
Thanks man i really didn't understand this before this video, best of luck for future vids!!
Thank you very much!!! It's really useful for my exams
jennie>>>
@@minvs yoongi >>>
@@mcnoldikesesase7751
@@minvs
Nice video,THANKS FOR THE HARD WORK
Thanks a lot!! Actually this helped me a lot!Thanks Again
WORDS CAN'T DESCRIBE HOW GRATEFUL I AM. THANKYOU SOO MUCH!!!
sir how can we find whether a substance is in excess in a reaction?
A substance is in excess if there is MORE than enough of a certain product to react with another product.
If A + 2B -> C
Then you need to know how many MOLES are present for A B and C.
For example if you have 1 mol of A and 3 mols of B, then you have an EXCESS of B because 1 mol of A will only react with 2 moles of B (so 1 mol excess)
However,
If you have 1 mol of A and 1 mol of B, then A is now in excess because there is not enough B to react with the reagent A (since 2 moles of B is required to react with it fully). In fact, only 0.50 moles of A will react if you have 1 mol of B.
You need to really understand the mole ratios (in this case 1:2) and figure out how many moles of each reagent are present, and how much will actually react.
I absolutely hate this topic. Your video made it a bit easier
Hey man, i just wanna talk about my Igâs. So basically iam taking my igâs in may june 2019 which is 6 months from now. I basically didnt study anything last year and i regret it very much and i just need motivation and wanna ask if it is enough to finish the syllabus n practice past paper within 6 months? Iam taking 7 subjects (Biology, chemistry, physics, math, english, math and geography) the subjects that iam worried is chemistry and physics. Iam so stressed
Hey man. 6 months is plenty of time I can assure you that! You just need to form a well thought-out study schedule for the next 6 months and stick to it. I recall I had a friend that failed most of his papers for mock exams but got As and A*s for his externals (which was just 2 months after the mocks). Anything is possible bro as long as youâre serious enough :)
Cambridge in 5 minutes I will try my best but do you think i can finish the syllabus within 3 months for the mocks?
Yes. But you need to study effectively. Donât hung up on all the little details. Rather, focus on key concepts and actually understanding the content rather than memorizing detail. Most of the detail can actually be learnt as you solve past papers
Cambridge in 5 minutes alright thank you very much
Rhenaldi Wijaya how did your exam go for you btw,
I watched this vid just before my test and i actually received 23/24 đ„đ„đ„đ„
h taught me more than my teacher in 2 years
2:48 u said -1 should it be +1 PLUS idk how to find whether a substance is in excess in a reaction
Thank you so much for belling me this video is so amazing my exam is tomorrow and I was panicking but now I understand it the video is very helpful
Helping*
Amazing Video!! đđ
This was really helpful! Thanks đ
tq so much you finally helped me understand stoichiometry
Your explanation is amazing
Holy this helped alot, thank you so much dude, I appreciate it so much
Thanks for these videos bro.
It would be more helpful if u could differentiate the core and supplement syllabus. Thanku
1 mole is 6.023*10^23 right??
I think you should re-name the channel to Cambridge Science in few minutes. Great videos btw,really helpful
Good luck to everybody in the comments that has a chemistry exam!
Literally me in a few hours
2:48 you made a mistake over there, it has got to be +1
Thanks for pointing that out ! Sorry about that guys, when lithium loses an electron it is Li+ not minus. Since YT has gotten rid of annotations I can't correct it in the actual video :(
I've been using your website since ages without even knowing that it was yours đđ€Ł
Thank you for all your video's
Your explanation is really magnificent ; However, I still don't catch the concept of mole ratio. I'm really struggling with it.
I see you on all these videos loool. Side note: I used to have a friend named Aya and she liked anime too! :D
Thank you so much for helping meâ€â€â€
This chapter was so hard for me at first but you helped me understand the chapter.
you said 20 grams of mg0= how many moles?
wouldn't it be 20 divided by 40, instead of 20 divide by 80
Thanks for pointing out the error :) 20/40 is correct
I've seen you on another igcse video before!
Nice, my exams are next week, and I barely understand, i hope the video help a lotđ
This helped me a lot thanks for uploading the video
my exam in 1hr you videos are helpful
Incredible explanation.
ion get the butene example from gas calculation
Sir youre videos are just amazing but have you stopped posting ??
this has really helped me.
thank you
Thank you you really helped me man
can you solve past paper questions on this topic
wish me luck and give me some tips as i have my exam on monday.
your videos are very good, keep uploading and thanku
Is relative formula mass used for ionic compounds used only ionic compound and relative atomic mass is used only for covolent compound because i found problem in the past paper about this.
Thank you sooo much.
Thank you. Ur video was very helpful
at 2:45 you said lithium will lose an electron so its charge will be negative 1 shouldnt it be pos 1
Um, is this info also for 0654 chem?
my exams are coming and i didnnt listen for a year so gotta crammm
this saved me BIG TIME thank you sm my exam is tmr đđđ
where's empirical mass?? and percentage yield?
You saved me đ
this is really useful thank for this
in questions like which substance is in excess how can we solve ?
Thank you so much!
I am very scared for my exam , can you please give me some tips to memorise
thank you so much
It was a great help thanks â€ïžâ€ïžâ€ïžâ€ïž
Me watching this 3 hours before my exam
Thanks so much for this video
It has helped me alot
hi
how many past papers should I do for chem p2 p4 and p4 ?for the IGCSE?
all
@@MuhammadIbrahim-us8lf THANK YOU !!!
THAT WAS SOOOO HELPFUL!!!l LMAOOO
@@yusrafathima9294 no but lie he's not wrong. solve as many as you can up until you take the exams. get that
a* girlll
@@almostmybedtime ik but you see when u have ur igcses ...theres a lot that u have to do that's the reason why I wanted to do just the minimum number of past papers
for self satisfaction :)
but yes I finished my Igcse about a year ago and I got a B IN CHEM 6 marks away from an A .
10:48 I donât get it werenât you supposed to divide?? For the mole of h2O???
Thanks!
pls what is rtp and moldm
i love you bro u are the best
18:17 there should be 0.005dm3 or 5cm3
best education i ever gotten