GCSE Chemistry - Le Chatelier's Principle #50 (Higher Tier)
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- Опубликовано: 2 окт 2024
- This video covers:
- Le Chatelier's Principle - i.e. the idea that when a change is made to a system at equilibrium, the position of equilibrium moves to counteract the change that was made.
- What happens when temperature is changed
- What happens when pressure is changed
- What happens when concentration is changed
This video is suitable for:
- Higher tier
- All exam boards (in some exam boards they don't call it le Chatelier's principle but they do cover the same concepts)
- Triple and combined science
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.
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- 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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Thank you so much normally have trouble studying but you help SO MUCH.
Hey thanks for such a nice comment! Really happy to hear they’re helping you learn - good luck with all your work 🙌
THANK YOU SO MUCH THIS WAS SO SIMPLE TO UNDERSTAND!! I HAVE AN EXAM TOMOROW AND WAS FREAKING OUT SO THANK YOU THANK YOU!
THANK YOU FOR WATCHING WALAA! glad you found it helpful 😊
Glaze
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How much did u get
Really nicely laid out and explained! Thanks a lot:)
Hey Reylt, really glad you found it helpful! Thanks for the comment too! (It really helps the videos to be seen :))
literally explained in 3 minutes what my teacher could not in a week , you are a legend
for some reason i find myself to not be asked to revise for chem paper 2 tomorrow
Thank you soooooo much actually the first video that helped me with this topic
Hey guys thanks for the lovely feedback! Really happy to hear it helped you out 🥳
Your a legend I missed like 2 lessons in class and they were about reversible reactions and Le chatelier’s principle and I didn’t understand a thing , but with your videos everything is just made so clear , easy and simple to understand .
Thanks
I’ve struggled a lot with understanding many popular people’s videos for science but carry on doing what you do because you’ve helped me so much and your doing an amazing job and I love your work
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I thought that I was going to fail my chemistry exam but I actually got a grade 9
this is my first time understanding this principle after watching lots of videos about it. Great and very recommended video
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Your videos are as good as a person who's on top and you explain all the structures very clearly thanks
for the concentration: how can more ammonia be produced if the level of hydrogen is not increased as well? surely the hydrogen would be the limiting reactant right??
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You just explained that waaaaay better than my teacher
ur a legend, the pandemic disrupted our education so much this year and probably next year which is my GCSE year. u literally saved me!
really helpful especially with my second wave of paper 2 mocks coming soon. I was struggling with understanding the concept but this has made it so much easier now its time to seal the knowledge for the real gcses👍
the dislikes are the people who failed their science test
Tomorrow i have exam on whole unit 3 and your videos just saved my day. Great way to revise quickly
I have a question. Can Le Chatelier's principle also be called "Factors affecting equilibrium"?
Yes it certainly can! That would be much easier :)
hi. for your last video on equilibrium, you said that heat encourages forward reaction, of equilibrium moves to the right, however, here you say that equilibrium moved to the right when temperature is decreased, which completely counteracts the previous statement? im a bit confused and would appreciate if you could answer my question before my exam tomorrow
the forward reaction reaction isn’t alwyas guarenteed endothermic, in different reactions the forward reaction can be exothermic
ans also if u watch the video 1:20 u can clearly see he states why it is exothermic since it is a negative
super helpful!
you're doing a lot for students in lockdown ;)
Thank you for your video. However, I am a bit confused about the shifting of equilibrium. Wouldn't the equilibrium constant change if the equilibrium position shift?( Eg. If the equilibrium position shifts right, the denominator is larger, equilibrium constant is larger too) thanks 🙏
how did you summarize 270 mins of chem class in almost 4 mins
literally was so confused about this topic and this video cleared all my doubts. thanks!!
same 😅
I was just doing some exam questions and I got stuck; I just didn't get it - I watch your video and immediately I understand. Thank You so much.
Thank you sooo much this was the one topic i have been struggling on for the past month and i finally understand
Youre amazing thank you!! I understand it so much more now :)
I'm a bit confused as to why that when you decrease temperature the counteracting change is an exothermic reaction which surely would mean it is losing even more heat rather than counteracting the temperature decrease. Other than that this was really helpful!
See i shall elaborate the reaction of So2 and O2 gives out So3 AND heat,
Forward reaction : 2SO2 + O2 -> 2SO3 + heat
Which means forward reaction gives out heat (exothermic) while forming product , and reverse reaction NEEDS heat ( endothermic ) to reform the reactants
Reverse reaction :2SO3 + HEAT -> 2SO2 + O2
So if i decrease the temperature of the system SO3 will no longer have enough heat to reform the SO2 and O2 .
And so the equilibrium shifts to forward reaction to resist the change occuring in reverse reaction
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He is a legend I was having problems with this and it got cleared
a few years later, still helpful, i will be using these videos for my mocks so thank you
thank you so much, I was having huge trouble understanding this topic, but you managed make me understand it all in a 4 minute video! Thank you so much!
Thank you for explaining this very clear and concisely. Because of online classes, only reading my handouts makes it more confusing than it actually is.
Glad we could help you out Don! 😊
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Thank you so so much, I was really confused about how temperature affects the position of equilibrium before watching your video. I truly appreciate everything your team Cognito does. Thank you ones again.
Thanks Qi Qi comments like this make it worth it!!
If the temperature increases surely according to the Le Chatelier's principle, wouldn't the exothermic reaction be favoured to get counteract the increase of heat (since exo is heat exiting the system) so it decreases it back down to the normal tempt? since endo thermic means heat is being taken so it would just keep increasing the temperature instead????
Hi Rizza! When we say system, we don't necessarily mean just the chemcals, it could be the water of a beaker or air of a container.
So if you imagine we were doing the reaction in a beaker of water... when we heat up the water, the equilibrium of our reaction shifts in the endothermic direction, as that will take in heat energy from the water and so cools the beaker of water back down. Hope that helps! :)
Cognito Thanks! I get it now - received this luckily a day or two before my Chemistry GCSE 😅👍
Thankyou so much it really helped me to understand.
You're very welcome! Thanks for the comment too! It really helps the videos to be seen :)
the Le Chatelier's Principle is very complex, I cant understand it
omg thankssss gsce in 2 months and pandemic disrupted my knowldge in chemistry
Great video
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Teachers should watch your videos and implement these types of teaching techniques so that we students can understand better.
You take the podium for once and see how teachers have a hard time with students like you
i was able to understand most of the theory in this but i further want to learn, how does the particles in pressure balance out when changed ik when there is higher pressure the equillibrium goes to the lesser moles but why?? van u explain?
I have never understood this topic and now I finally do!!
Yay that's great to hear Aniela!
Thanks. Really helped
Yes this was very helpful thank you soo much❤️
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Thanks Aoìfe, it's definitely something we'll look at for the future
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someone who can actually explain this topic tysm!
I have my finals tomorrow and it's covering the entire IGCSE syllabus - all the way from states of matter to experimental techniques. Needless to say, I was feeling extremely stressed but this video helped me so much, THANK YOU!!
My teacher have a good taste of videos for us lol
This helped me so much. TYSM
This helped me understand the concept as a whole as prior to this I had the wrong idea of what Le Chatelier's principle was.
This video is really helpful.
My PEE's are starting next week and i am seeing ylur videosfor each topic (Bio,Chem&Phy). Its really helping me alot. THANK YOU
Hey dunno if you'll see this, but does this mean that each reversible reaction in a closed system will have a constant pressure and temperature it will always be at? As say the temperature is A when the equilibrium is in the centre, then you increase the temperature - the reaction shifts along the endothermic route, decreasing the temperature back down again. So the temperature has remained constant, your increase in temperature didn't really increase the temperature, as that was counteracted, but rather increase the concentration of the endothermic product?
Was helpful
Thank you so much! I understand completely now
Glad the video helped! 👍
legend
What about when u decrease concentration why does it not move ?
I was literally about to cry yesterday in class when we did this topic cause I wasn't understanding 😭this help so much🙏🙏🙏
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I finnally understand this thanks to your well explained video. Keep up the good work!
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This really helped me to understand the concept! Thanks for the amazing vid !
nice! just curiuos what is the example of le chatelier's principle in home cooking?
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What happens if the concentration of the product decreases
lmao this is the first video that made sense and the tutor didnt sound annoying. thnx
What will happen if the Number of molecules are the same? Like A + B ----> AB. What effect would changing pressure would do in this case?
If it was all gas molecules on both sides then changing the pressure wouldn't affect the equilibrium (but it might affect the time taken to reach equilibrium). Btw sorry to nit-pick but 'A+B' looks like more molecules than 'AB'.
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thanks so much
Thank you, Helped out a lot!
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2 hrs before the exam! wish me luck
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Le Chatelier's Principle
Thanks! It really helped to understand a lot better
ap chem student here! thank you for saving me!
wow ngl this helps thanks.
nice
tysm bruv life saver
Thanks man I literally have a test in 1 hour
isn't it moles for pressure rather than molecules
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