GCSE Chemistry - How to Calculate the Rate of Reaction - Measuring Rate of Reaction #48

[@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

[@ubaidarashid6436]

excuse me, on your website if you put you dont know what exam board your doing how do you reverse it once you do know

[@Ziad-cp3lu]

Can you please make A level videos

[@qsd-z3d]

Hello sir, Can you explain to me one thing. In the graph question for finfing the rate of reaction at 2 min, u Did 1200-170 seconds while they ask for Minutes or use minutes, So is it must to use seconds?

[@lorzii621]

Hello cognito, why is it when you draw a tangent why does it depend on how long the tangent is?

[@user-nd2dc9dk1m]

God bless you , you are literally helping children all over the country pass their exams. Before I was really struggling with chemistry but since I've been watching your videos my graded have improved. Thanks❤️

[@Cognitoedu]

Ahh thank you for this comment! It’s so motivating for us to hear that they’re really helping you understand the material! Keep at it, and wishing you all the best with your work 🙌

[@ararix3722]

Which country are you talking about is it France? :) cuz then yes

[@Jess-pe8dp]

Same my grades improved so much I’m so proud of my self and my teacher is proud aswell she keeps on saying why can’t no one else answer a question and we basically have a conversation only between us 🙄😂

[@evan.5967]

@@ararix3722 ouaih

[@T1murr]

now I cannotott

[@mollyshackleton7760]

Chemistry is my weakest of the three sciences. I find it more interesting than physics but I struggle to remember chemistry more than physics. Thanks to these videos I got 80/100 in my paper 1 mock which is the best I’ve ever done in chemistry ever. We haven’t got the grades yet because we can’t see the boundaries until we get our results but because I do single sciences I know this will bump my chemistry grade so much! Thankyou

[@Cognitoedu]

That's awesome to hear Molly, well done on your mock!!! 🥳🥳 So glad we could help! 😊

[@lemonlime8949]

What grade did you get on mock

[@mollyshackleton7760]

@@lemonlime8949 we never got told the grade boundaries but I got a 9 as my actual GCSE grade. I am now doing chemistry for a-level.

[@grxgr9213]

@@mollyshackleton7760 congrats :) I'm planning on taking chem for A levels too - plus I have a paper 2 mock 5th period today

[@obscureoddity3071]

@@mollyshackleton7760 What's it like doing A-Level Chem? I plan on taking it too but I'd just like to know what I'm getting into :)

[@annabelle466]

Thank you! I was worrying whether the length of the tangent affected the answer, but now I know it doesn’t! Only the steepness does

[@zainmohammed2652]

Mate! I don't know what to say I got my mocks next week and I've been watching your chemistry videos and I've got a really good feeling I'm gonna do good thanks to u keep up the good work :)

[@Cognitoedu]

Hiya Zain, thanks for such a kind a comment! Really happy to hear you’re finding the videos useful, and fingers crossed for your mock. I’m sure you’ll smash it 🙌

[@غدرالزمن-ز6ي2س]

Hi How was the exam. I have my chemistry exam tomorrow 😢😢

[@pythonicdemon1200]

@@غدرالزمن-ز6ي2س how was your exam lol my mocks r coming up soon rn

[@غدرالزمن-ز6ي2س]

@@pythonicdemon1200 it was really easy don't worry

[@غدرالزمن-ز6ي2س]

@@pythonicdemon1200 good luck 🥰

[@achoo3001]

thank god i found this channel. honestly saved my life.

[@bigfoid]

thats a bit extreme achoo

[@neel_bansal]

Ay mate can't thank you enough my teacher uses these to teach us and it is very informative. So many of my friends were struggling with chemistry until you came along thank you so much for making the lives of so many kids around the world a bit easier

[@dhruvmittal3483]

But there are no tough equations in this!

[@neel_bansal]

@@dhruvmittal3483 I know but he helped u pass

[@EveryoneHarmonyPeace]

The drawing of "a tangent line" is a pretty ingenious way of finding the rate of reaction at a specific time. One thing I like about Chemistry is, you can apply your Math knowledge on it.

[@sillystringeater]

These are really good to just put on in the background and listen to them constantly while you do other stuff to get the info in your brain. Obviously still actively listen to each video a few times and do your actual revision but that's what I do with these

[@bombayboutique2725]

You videos have cleared out so many topics which I wasnt able to understand earlier

[@nathankemp8398]

your videos are actually rlly helpful when it comes to revise keep it up bro

[@Cognitoedu]

Thanks, glad they're helping 🙌

[@idunno...2179]

Thank you so much, I don't know what I would do without your help before my tests. Thank you!!!!

[@THEHUNGRYTALLGUY]

bro thank you so much, my teacher, made it so complicated thank you so much brooooo

[@cristiano4472]

Sir, keep doing what you are doing. It is an excellent work. Your videos help so much!

[@urekah37]

Just wanted to give a sincere thank you for making this video.

[@Cognitoedu]

Ah you're welcome!

[@Jess-pe8dp]

Never stop MAKING VIDEOS your literally changing my life ❤️❤️

[@eyeshaq936]

Thankyou so much!! This is a main focus for the GCSE Paper 2 exam this really helped!! xx

[@Cognitoedu]

Glad it was helpful!

[@Emilia_568]

Watching this before chemistry mocks 👍👍👍

[@subuwu3711]

omg reall🤑🤑🤑🤑🤑🤑

[@Emilia_568]

Chemistry mocks tomorrow again 👍 night before

[@John-qv5vu]

I got a 9 in my biology, physics and chemistry mocks because of you thanks a lot

[@parthdedhia2050]

Definitely, I didn't enjoy it as most of the students don't like studying. But was really helpful for my upcoming exam.

[@tarikatrezy3962]

I am writing today and I find your videos helpful, thank you.

[@Na-God]

Omgggg Thank youuu so muchhh i have a science testt tmr and this was so helpfull

[@Kiara_Minnie]

hey, just a quick question in the time 4:17 of the video you said that the denominator is 170 how come? 3 minutes in secs is 180...

[@inderveersingh8658]

Yes but the change in x is 2 mins 50 which is 170 seconds

[@kitchenwithhiba4337]

Thanku so so so so much i helped me alot Now i am able to solve the graphs questions without my teachers help

[@delandel]

This was really helpful, thanks.

[@Cognitoedu]

Hi Juls thanks so much for the comment - really appreciate it! And really happy to hear you found it useful 🙌

[@siap6511]

I went from a 25/30 to a 30/30 in chemistry JUST because of your videos, thanks bro

[@ce3dubs]

im confused as to when to draw a tangent line? the first example we didn't have to but then for the others we did. is there like a code word that triggers us to know when to draw the tangent

[@akeibazli8942]

Excuse me sir will it be fine if i were to extend the tangent line until it touches the x-axis and the y-axis?

[@JoJo-qc2kw]

Thanks alot i understand these types of questions now!

[@eyeshathafaa5730]

can i use this methods and calculations for concentration against time graph too?

[@malk5961]

how did you get 0.72 ?? because the tangent was above 0.8 ,, so wouldn't it be 0.8+ (something like 0.89 or something like that)

[@Jess-pe8dp]

You teach me better that my actual teachers

[@tasibasultana8121]

Thanks you! It really helped me❤️❤️❤️.

[@grif.t7852]

one of the best videos. thank you

[@Cognitoedu]

Thanks Grif, glad you liked it

[@grif.t7852]

@@Cognitoedu dont give up bro You got this👊

[@ihsannurmizan6128]

How can we determine the start of the tangent line, as mentioned at minute 05.18? There it starts at point 1 minute 40 seconds

[@Sarina-e5q]

Thanks, it was very helpful.

[@mahinahmed-vh3du]

chem paper tomorrow , this vid helped alot bro

[@CarloKachipapa]

Cognito you're my hero!

[@rocketcabbage]

does it matter exactly how steep the tangent is? bc i feel like im going to draw it at the wrong angle

[@HoorMohamed209]

Just to clear a mistake! at 4:22 the answer to 600/170 = 3.529411765, not 3.53, or did you just round it?

[@bjorncorvin4568]

He rounded

[@aaravsharma4643]

you are so helpful!!!!! Thank you so much

[@Cognitoedu]

You’re welcome, glad to hear you’re finding them useful!

[@janellereid4251]

Can I extend the tangent line to touch the x axis along with extending it to the y axis to find the gradient ?

[@tenzonium]

if you manage to keep the tangent line straight then yes

[@qsd-z3d]

Hello sir, Can you explain to me one thing. In the graph question for finfing the rate of reaction at 2 min, u Did 1200-170 seconds while they ask for Minutes or use minutes, So is it must to use seconds?

[@davidohre-d9m]

Thanks, I have a chemistry test tomorrow about this topic

[@gamexx6676]

how did you get the 0.72 in 5:23

[@abigailk6500]

i think it was a mistake because the line is clearly over 0.8

[@yourfav9275]

@@abigailk6500what I thought

[@willp4901]

wont the length of your tangent change the result you get for the specific Rate of Reaction?

[@randnev]

The slope of any line straight line is constant. It doesn't matter which 2 points you pick anywhere along any length of the line, you'll come up with the same answer.

[@l0v3ka]

thats what i thought i dont know how long or short to draw my tangent

[@CT-sn3hx]

when working out the rate of the reaction, where did you get 60, when doing 1200/4x60

[@Its_Speeds]

in a minute there are 60 seconds

[@CT-sn3hx]

@@Its_Speeds ohh thank you so much!

[@danielstacey2660]

What determines the length of the tangeant? If you drew it longer it would change the value, no?

[@danielstacey2660]

ahh i think i solved my question. so it doesn't matter where on the tangent you chose to take values because as a straight line it will still be y/x wherever you choose.....is that right?

[@hanakalia4983]

just wanted to ask if u are ever going to do a level content?

[@twa9342]

Can I simply find the derivative of the curve?

[@mazturner9230]

Got it! Thanks Amadeus

[@brunobucciarati7919]

What if I make my tangent too small or too large?

[@Sapiention]

That's what I've been trying to figure out as well, in the video he say's it does not but obviously that's wrong since the value of say, 600g/3.5m is far different to 600g/4m

[@ineshakarawita8023]

the only reason im posting ithis is because I wanted to get the 50th comment but still, u explain things better than teachers. u should set up ur own school and no matter how much you charged, people would pay up (up to a certain value of £).

[@randnev]

Wouldn't it have been helpful to show that the last one would have a negative slope (then discuss why we would/wouldn't display your final answer (rate) as a negative value)?

[@Phvntasm]

At 0:44 why did we multiply by 60?

[@Emily-oh4rb]

He is just converting it to seconds as that’s what the formula requires (60sec in one minute - 4x60) 😊

[@v1yanbh]

I just started y10 I’ve gone from grade 2 science to grade 5 tysm!

[@coolgamer8359]

How to know how long to draw the tangent plsss answer

[@EnglishFishBTW]

Will you ever do a-level physics content?

[@dhruvmittal3483]

I am here from EY to review the videos The video seemed helpful But there was no SK Dash Thank You

[@neel_bansal]

Yes he should SK Dash

[@dhruvmittal3483]

Yes, that will help a lot for this KZbinr to make his videos better

[@alpaktug3347]

I cannot thank you enough!

[@baladivya1]

This doesn't make sense. Why is the tangent touch 2m 50s when it should be 2 minutes?

[@marieanneschroeder4894]

because they traced a line down to the x axis from the tangent

[@bjorncorvin4568]

Got a Science test tomorrow and I am feeling good

[@fishermanmoo8874]

Thank you

[@Skibidiash]

goat 🐐

[@hannahahn521]

You saved me😭😭😭

[@Jess-pe8dp]

I have a science end of term assessment and I have a lot to revise in 1 week but I can do this since I came from school I am revising so 4 hours and 30 minutes and I’m really tired

[@aishamohammed2900]

Thank you so much

[@Rache-sx7lc]

But is it true if i draw the tangent longer that wont affect the value

[@VOLTEX-]

thank you :)

[@cattomint4313]

this topic made me cry

[@furios9587]

thanks man i have a an exam and i couldn't understand shit tell I watched this

[@mohammedtariq5724]

Did you pass the exam? Just curious

[@rhyshowells1644]

👏👏

[@Wojbest_YT]

2:31 it not 1200 as the line is a bit under that

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sir do u want me to buy u a better mic

[@FortAccount-nd5ih]

Chem in 2 days

[@onepasta5733]

In 1 day now

[@uhidk18]

😐 this came up again in A2