GCSE Chemistry - Reversible Reactions and Equilibrium #49

[@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

[@scarzz3622]

How I make an account for it

[@OanddA]

bruh i feel sad for u cognitio, just 1 reply? naahh

[@SD-qb6ft]

me trying to learn all this before my mocks in two hours:

[@claraishungry501]

me right now :')

[@SD-qb6ft]

@@chrismaximo686 why would u hack your friends insta tho

[@claraishungry501]

@@chrismaximo686 no one gives a damn. and why would anyone hack a friend? thats mean

[@imr818]

I hav my boards in the next 2 hrs...fml!!

[@mollyshackleton7760]

Same

[@sakicore3588]

Your channel single-handedly carries my entire course, thank you

[@biyapoo]

revising for my test tomorrow on rate of reactions, reversible reactions, equilibrium and la chatelier's principle. wish me luck..

[@killua9369]

How was ur exam?

[@Competition-qn2sq]

Grade 9 right

[@lipbalm9123]

good luck bro

[@doboy9]

@@Competition-qn2sq Grade 8🥴

[@womanblack1108]

Lol same 😂

[@MOQKD]

These teachers on KZbin are literal life savers for us 2020 kids ❤️❤️❤️❤️ love u

[@farianafees5805]

True my friend

[@nimishagupta6396]

TRUE words

[@miabarimaga]

this is so good saved my gcse (learning everything the day before)

[@anashaikh2272]

Frrr hope tmrw goes well

[@mbcoming417]

Same exam in like 2 hr and i am learning important things now

[@a.mO99]

how was it?

[@miabarimaga]

@@a.mO99 it went fine i got a 7-6 in comb sciences😭

[@nour4620]

Ur 6 mins video made me understand what my teacher explained in many classes Thxx a lot it was extremely helpful

[@enikosarusi-kiss3650]

thank you the visual presentation and the overall explanation made it very easy to understand

[@cstone1719]

Only 2020 chem kids will remember this

[@swervv_lulzsec3272]

only i our flash backs

[@swervv_lulzsec3272]

in*

[@boary4273]

shoutout mr stines first period.

[@SilverAceOfSpades]

I was assigned this video so yeah

[@mohammadathar9299]

Uhhh ahhh

[@tejaschanchal763]

Thank you for your videos. I found your method of explaining easy to understand and the syllabus is well covered. Good luck for the math videos, I will be waiting :)

[@Cognitoedu]

Thanks Tejas, glad the videos are working for you 👍

[@BalaVignesh-b4w]

My entire lecture of reversible reactions and Equalibrium that lasted for 40 mins, in a simple and fun-to-learn 6 mins video. Thanks so much! 😊

[@kpopfan9550]

Watching this during the Coronavirus lockdown

[@anna2470]

still am

[@joelgriffin9302]

still am

[@kaii-x8t]

yeee rn its hmpv virus lol

[@zainabsworld9595]

Thank you for uploading such helpful videos! They really help me with my revision and I feel like this channel will be responsible for me doing well in my GCSE science exam

[@shahbazmehmood6464]

Sorry

[@GAMERX-wj4yv]

Easiest Explanation To Equilibrium I Could've Possibly Find, Thank Youuuu!

[@farihasanti5362]

hi i just wanted to say you're my saviour amen goodbye

[@Cognitoedu]

Haha thank you mate really happy to hear the videos are helping. Good luck with all your work 🙌

[@burntcereal7116]

Day before gcses revision 🙏🙏

[@karlos5057]

Thank you! Was extremely useful! I managed to do my homework a lot faster thanks to this video.

[@mackcusk]

i agree

[@karlos5057]

@@mackcusk (づ｡◕‿‿◕｡)づ

[@seenrunning616]

Good luck for chemistry yall

[@strawberryslice]

ngl my chemistry teacher moves way too quickly to the point where you cannot sometimes grasp the information at hand but this video helped significantly thanks!

[@daava9700]

00:08 Reversible reactions and equilibrium 00:53 Ammonia and hydrogen chloride can combine to form ammonium chloride in a reversible reaction. 01:38 At equilibrium, the forward and backward reactions occur at the same speed. 02:23 Concentrations of reactants and products at equilibrium can vary. 03:06 The position of equilibrium can change depending on the conditions. 03:48 Reversible reactions reach equilibrium in a closed environment. 04:32 Heating hydrated copper sulfate drives the reaction to the right, evaporating off the water 05:14 Reversible reactions and equilibrium

[@rawanmustafa4305]

year 9 final exam , this is so useful . Thank you , you saved us

[@Zene-vu6fm]

I literally got 49/50 on my quiz. THANKS YOU SO MUCH 😘😘😘😘😘

[@asimiakhuiniaugustina-ki9gu]

Me literally trying to store this inky memory before tomorrow's test. Thanks a lot your channel has been really helpful with all my topics

[@anashaikh2272]

Legit got my p2 igcse tmrw and I’m learning this now 😭

[@yousefawniyousefsaadeh817]

I swear to God that you are a chemistry legend

[@abdullahahmed3843]

Exams in May, dragging my arse off. It's confusing

[@amanda-yf9dw]

I feel so relieved after watching this before my mock its like a recap for me🧘‍♀️🧘‍♀️

[@kirozakaria3158]

you explain what my teacher couldn't in 3 hours

[@angparaluman6186]

Love it!!!!!!!!!!! I understand it now!!!!! Thank you so much 😭😭😭😭

[@inarimikami8685]

anyone else struggling to cram this in for the next day exam? me too

[@fake_in_world2635]

Meee

[@videos-pn9wi]

every year bro

[@shreentrivedi1181]

Thank you so much for this, i didn't understand one of what my teacher taught me but here I understood everything, i won't fail today, thank you so much!!

[@Tera_Trix]

i have my mock tmrw and because of this video i understood. Many thanks

[@thejandinuja3000]

This guy is the best man

[@aditijain3516]

Your videos are great!!! I have my half-semester now after 2 days, which helped me understand the whole concept. thanks a lot!!!!.🙂🙂💯👍👍👍. Great work guys...

[@nourallahmourad3165]

May 2020 exams sure will be hard :/

[@cali7433]

Nourallah Mourad what exams, the world is in lockdown! 😂

[@nourallahmourad3165]

Daisy Gaudern yeah ik 😂 that was a month ago when I commented that. I love Cambridge

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Now 2021 exams will be hard

[@mr.yousif1415]

@@ehwhynot7631 ya they will have more time to look at papers and make it harder

[@stillwithjas]

@@mr.yousif1415 both may and oct 2020 are canceled in my country lolll

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It actually feels good to know that there are so many people screwed just like me.

[@scary.Redit.storys]

your the only reason that i pass chem

[@Faster2525CK]

You explained good, really appreciated!

[@victorcapitano]

Thank you, this is very nice and helpful

[@martas3144]

One arrow to the right=one way reaction Double arrow=reversible reaction Happen at different rates(below) ""Backward reaction"Forward reaction" Equilibrium= both of the reactions occur, but cancel each other out. Here the reactions happen at the same rate. In equilibrium, the concentrations of the reactant and products stay the same but they are not equal to each other. The positions of the equilibrium can change. If we cool down the reaction, the line of equilibruim goes to the left because there are more reactants than products Exothermic in one direction, endothermic in the other direction No compounds can escape from the reaction because then the reaction would never reach equilibrium, so there is a closed system

[@mumtazxxxx]

Thankyou so much once again a fantastic explanation and great video!!!

[@avenger2772]

got mock exam tomorrow and learnt a lot from you video, thanks brother, wish me good luck so I get above 60 /70 🖋🖊

[@eleanorlacey]

i get it! i get it! i get it! i FINALLY get it! thank you SOOOO much cognito!!

[@Cognitoedu]

Yay, glad we could help!! 🥳

[@chidianikeze464]

Love the teaching keep up the good work 🎉

[@sitiqistina504]

thank you so much for this video ! this helped me so much to understand this topic , have a great day ❤

[@goodbeds143]

I love how reversible reaction Deny the "chemical reaction characteristic" which is unable to become the original version (reactant) when already taking up the reaction

[@Harini_24]

How do we tell if the forward or backward reactions are exothermic or endothermic? p.s TYSM, you are literally a live saver and I'm sure I speak for hundreds of other students out there.

[@eliselomotey5859]

The question should tell you I’m pretty sure

[@shumailamuzaffar2861]

If the forward reaction arrow is towards reactants side it's endothermic if the arrow is towards products side it's exothermic.

[@myballs2900]

⁠@@shumailamuzaffar2861 is the forward rate not always pointing toward the right?

[@helenahaque-bousquet228]

hey your videos have helped me learn everything i know i am doing my mocks at the moment and was wondering if you could make an app for phones so i can look at the videos and quizes that you have on your website before i go into my exams you have helped my loads thank you sooo much.

[@emelyjan9957]

Thank you so much in six minute i learned a lot

[@edwinaldrin3290]

Good stuff! : - )

[@Cognitoedu]

Thank you!

[@nimcoaxmed4219]

Watching this video just before my igcse chem paper 2👀😍

[@aquilastar2592]

my school has decided to put this in a year 9 test... so this is just me trying to understand how it works rapidly the night before 😬

[@hareemshahid1423]

Same here bestie

[@f_vv3268]

no cause literally same w me rn

[@shoneappuhamy5165]

Sir, how does it effect the equilibrium position when the pressure is increased but in this case it the reversible thermal decomposition of calcium carbonate, where you get calcium oxide and carbon dioxide, does that mean increasing pressure make it move in the direction of making calcium carbonate or is there no change?

[@ravish3028]

Good luck to all who r facing the examination tomorrow

[@lcharkie]

u too pal

[@ravish3028]

Hi make sure that bold text and topics in the spec are only asked in paper 2

[@Wojbest_YT]

i can learn more in a 45 sec recap than an hour lesson

[@kedusyared6589]

One word for the content...B E A U T I F U L!

[@ItsKingFabio]

Just started revising for my mocks tommorow. How cooked am I?

[@muhammadsaif780]

Thankyou very much! This helped me so much

[@emanmohsin1035]

Litterly watching this the night before my test Helped loads TYSM !!

[@falconprogramminggaming8218]

How was your test?

[@emanmohsin1035]

@@falconprogramminggaming8218 went amazing

[@mahirprince264]

Brother I have two confusions...Can u plz help? i)what is actually meant by concentration? Is it how dilute or dense? Or is it referred to as amount? In my book its written concentration (amount) what is amount!! ii) what is meant by that the reactions are equal or constant? Does that mean they are at exactly same rate(speed) or are they constant within themselves? By same rate I mean if one is turning into other as 5, simultaneously other one is turning into first one as 5..u et my point... Please please help😥😥

[@ruoyuxu6918]

1. The equilibrium occurs when the rates of forward and reverse reaction are the same, and the concentration remains the same. 2. The reaction happens in a closed system 3. Dynamic never stops

[@stealthyninja1122]

If I pass its because of this guy

[@muhammadjawadulhaq]

I'm thankful 💕 love from Pakistan 🇵🇰🥰

[@jayjam9106]

Fantastic explanation

[@AlqallafSadeq]

Great work, as always

[@ravish3028]

Mr trying to learn this before my Ol IGCSE examination

[@killertactics8904]

Thank you sir it is really healpfull 👍👍👍

[@nourmohamed5587]

Doesn't adding water to the anhydrous salt changes the reaction and it's no longer reversible ? It's a direct reaction ?

[@anikahasan8278]

cramming for gcses (learning instead of studying) have faith tho bc i got 7 in my mocks with 0 revision.

[@Mr.INDIA_08]

Nice video for students 👍

[@Alz-25521]

Watching this 5 minutes before my GCSE test

[@loadeddiaper4216]

How was it?

[@aymannasib6320]

I have my igcse tomorrow wish me luck ❤

[@Hgghging]

How do we recognise if a reaction is Endo or exothermic

[@hanakalia4983]

it depends but for example if you are heating a reactant then that means you are putting in energy, this tells us its a forward reaction can be endothermic, after the reaction reverses this means it has to be to be exothermic because the energy Is released, idk if this makes sense but yh

[@kavipanchmatia1004]

They tell you

[@alejandravalle6315]

how do u know that the forward reaction is endothermic and the other one exothermic

[@fatimai01]

do you only need to know the temperature or do you need to know pressure and concentration

[@abeershaaban4145]

Great video

[@Fatimaurooj.911]

Literally I have mock in 2 hours and I am learning here🙂

[@benharrison9419]

Me : trying to learn the whole of chemist the same day I have my gcse 👍

[@disnickthingz5408]

Same here

[@charlieholme5908]

Yep same

[@disnickthingz5408]

@@charlieholme5908 so how was it

[@charlieholme5908]

@@disnickthingz5408 it went alright tbf, some of the questions at the end of the exam were abit funky😂 hbu?

[@disnickthingz5408]

@@charlieholme5908 i really liked it, the chromatography questions were a 10

[@amitjohn-y8f]

amazing video

[@Inayahkhurram2010]

I've a question how do we know when a reaction is exothermic or endothermic in the hyderous thing ?

[@satire-r8h]

I have a question how would pressure affect the equilibrium

[@ayzelplayz3543]

Really helped me out

[@readingamber]

hardest topic for me in chemmmmm

[@gurulinggbiradar6982]

what do mean by speed of reaction . equation please

[@jollyelmroot]

How fast the reaction takes so basically the rate of the reaction

[@gurulinggbiradar6982]

@@jollyelmroot i know the meaning. but we plot a graph for speed vs conc. so i asked how do we measure that rate of reaction. because there are multiple products and reactants so which one are we plotting on graph.

[@amunet593]

Thx for the vid !

[@ayzelplayz3543]

Informative 👏👏

[@shalinifernando7265]

Thank you very much...

[@UmerKhan-sy2qf]

Revising for tomorrow's cieschemistry atp

[@faiza3223]

Thank you so much sir

[@BennaCaique1]

How do I know if there is more products than reactants in my reaction ?

[@shahbazmehmood6464]

Go check out his video on le Chatliers principle

[@shahbazmehmood6464]

If forward reaction is occurring at a faster rate than backward reaction

[@alexlow9714]

4:18 Hi May i know how do you know the reaction is Endothermic?

[@alexlow9714]

Are all forward reactions Endothermic?

[@haiqa3192]

the forward reaction is endothermic because we are heating the reactant so it is gaining energy. hope this helped

[@alexlow9714]

@@haiqa3192 thanks!!

[@haiqa3192]

@@alexlow9714 no problem

[@marcelaleyva6700]

What determines if a reaction is reversible or irreversible?

[@ayeshanoor3504]

How do you know which side is exothermic and which is endhotermic?

[@xm_soloplay7319]

Forward reactions are exothermic as bonds are being formed and backward reaction is endothermic as bonds are being broken

[@dakin2958]

they tell you in the question on the exam

[@yixyaxo]

actually thank you so much

[@Someone-dq4zt]

I’m confused tho. how can the concentration of the reaction and products be the same if there’s technically more product or the reactant 😭? (I’m sorry I’m not the brightest )

[@monst3r.svt13]

watching a day before exam 🩷

[@aaronhilsum5159]

@cognito how can you tell that a reaction is exothermic or endothermic? Thanks.

[@hellena9819]

if the energy change is negative it is exothermic and if its positive is endothermic. in the haber process the forward reaction is exothermic and the backward reaction is endothermic. they might also tell you the result and then from there ask you to say whether its exo or endo and youd usually work that out by if the temperature increases, a closed system at equilibrium will favour the endothermic reaction and vice vers

[@uphilldew]

endo = in exo : out thermic(thermal) : temperature if temperature is going in,that means it will be hot,so it would be (+),endothermic. vice versa

[@HRAEHDA-vx7fv]

Thank you soo much

[@kaihutchingsmcconkey8431]

Nice one mate night before gcses’s

[@justaperson1998]

me teaching it to myself since I can't focus in online lessons for the life of me

[@hareemshahid1423]

Ig evryone can relate to this

[@bluee128]

@@hareemshahid1423 yup