GCSE Chemistry - Rates of Reaction #46

[@Cognitoedu]

If you’d like to practise the material covered in this video, check out our platform at www.cognitoedu.org - it's totally free, and has been built to make learning and revision as easy as possible. The main features are: - Lessons organised by topic, only the lessons relevant to your specific exam board and tier are shown. - Automatic progress tracking. Progress bars tell you what you’re doing well at, and what you need to spend some time on. - Practise quizzes so you can test your knowledge. You can quiz yourself on any combination of topics you like. - A huge number of fully-hinted questions that take you step-by-step through some of the trickiest calculations & concepts. - A comprehensive bank of past exam papers, organised both by year, and also by topic. Amadeus & Tom

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For those of you who need to remember the equations DONT write down ‘amount’ or ‘quantity’. I did that in one of my tests and it got marked wrong even though that’s what it said in the textbook which I thought was very unfair!. It said instead you had to put ‘mass’ on the mark scheme and I don’t know if this is just for AQA exam board but thought this might help people so they don’t make the same mistake as me, these videos are very informative so keep up the good work 😊

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Yeah my bio teacher is fuming if you put "amount of gas produced per second" instead of "volume of has produced per second"

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at 1:18 he spelt 'quantity' as 'quatitiy' anyway 😂

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@@taniakalsi2454 You are the only person that noticed

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Correct me if I’m wrong but I thought A* was an 8 and A** is a 9 I’m in year 9 at the moment so it might of changed

[@caecilius9578]

@@TR33Zzz It is, sort of. The English GCSE system is slightly different than the Northern Ireland GCSE system. In NI, we don’t use the 9-1 grading system, we still use A*-U. I got an A* in our system - the highest grade we can be given, as we don’t have A**. To avoid confusion, I gave both, but they’re roughly equivalent :)

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I hope that anybody who has an exam soon passes and gets their desired grades

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You’re veryyyyyyyy welcome - thanks so much for the comment and wishing you all the luck for your exams 🤙

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Thanks man! best video so far after streaming 30 minutes in the whole KZbin closet about reaction rates!

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This was really helpful, thank you 😊

[@Cognitoedu]

Hi Lucy - you're very welcome! Thanks for taking the time to let us know :))

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Thx you made my exams much easier!

[@Cognitoedu]

Thats great to hear Samuel, hope they go well 🤞

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thank you so much bro, can do in 4 minutes what my teacher tried to explain in 1 hour

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[@Cognitoedu]

Hey thank you for the support! Really happy you like it :)

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[@rahmakhn]

Question: Why is there such a big difference in values when measuring the same rate of reaction in two different ways. Shouldn't they be roughly the same?

[@bentright_through4936]

What do u mean two different ways

[@blay2007]

at 2:18 i don’t get where the 60 came from, can someone explain?

[@dias_tony9555]

Idk if its too late but basically in a min theres 60 seconds so when it says 4 mins just times 60x4=240

[@blay2007]

@@dias_tony9555 no its alright lol, but still thanks for your help

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@Cognito do you have any sample questions for this topic such as experiment data?

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my exam on this is tmr ! thanks for being a better science teacher then the one i have at skl.

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Revision starts now, I have 2 days and a half

[@awhzie]

GOOD LUCK!

[@nikolaistepanovic8704]

am i wrong or did he missed on N on QuaNtity of Reactants used

[@elliotlikesdinos]

Quatity, I saw it too

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was looking for this comment lmao

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Thanks man; simply a phenomenal video

[@Sam-si4yy]

Thank you so much for the video , it was really helpful. But i am doing an igcse course, is this still reliable ?

[@Cognitoedu]

Hi Sam, glad to hear it was useful! Yep the huge majority of what we cover will be useful to you - but to be 100% sure you should find a copy of your specification to make sure there aren’t any small topics that aren’t covered, but that you need to know! Good luck with all your work!

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@@Sam-si4yy Have a check on SaveMyExams- www.savemyexams.co.uk/igcse-chemistry-edexcel-new/revision-notes/ to check any topics if ya want, that's what I do also thanks Cognito!

[@Rayan-qy8mg]

I’m starting this topic in September. Thank you for this it gave me a good understandingg

[@motivations-d6s]

To summarize: rate of a reaction just says what's the speed of primary substance to change into products or the time it takes for a specific amount of products to be produced.

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Nice to hear it helped! 👍

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Great video! This topic is very confusing so thanks very much!

[@tarrnish9462]

4:22 will it be 0.6/2 or 0.6/120

[@randomacc77777]

0.6/120 because mols/s is the accepted one

[@zahraaa59676]

0.6/2 because he chose the unit mol/min not mol/sec

[@blaze-storm9008]

At 2:22 the spelling for quantity is wrong in quantity of reactants used. Just thought I'd point that out otherwise amazing video 😅👍🏾👍🏾

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Who had chemistry with me and has to watch this for homework

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[@Cognitoedu]

Yes

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Oh i see - we edit it all in iMovie :)

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Thank you Yoyo! Really happy to hear it 💛

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It's 2022n I'm watching these videos, very helpful than my teacher

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me lmao

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[@gurulinggbiradar6982]

in chemical equilibrium we say rate of forward reaction is equal rate of backward reaction. what do we mean by that if there were just one reactant and one product then it is eay to to understand. are the rate in equilibrium and kinetics the same. what if there is more than one reactant or product then how doe define rate forward rxn or for that matter rate of backward rxn. is this doubt non sensical

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can anyone help me with example 1? I put into my calculator 180cm cubed divided by 120 but don't get 1.5, am I doing something wrong?

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180cm³/120 did u do it cubed?

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how was the exam?

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[@kamilajon152]

01:26 - spelling error "quantity" was misspelled as "quatity"

[@Xx_skibidi_lun_muncher_xX]

shut up

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shut up

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shut up

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So mol/s is wrong right?

[@akeibazli8942]

I was wondering the same thing😂

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Thanks

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Who is from ISB

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Can you please make a vidoe on transition state theory.

[@gamerben2089]

1:50 you spelt Quantity wrong just felt like you should know that as you wrote "quatity"

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Idk why I’m studying this in grade 7

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[@lil_abrh]

*quantity at 1:46

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1:14 quantity spelling error oop

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You spelt a quantity wrong for one of the equations

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Gl for tomorrow exams