GCSE Chemistry Revision "Reversible Reactions"

[@tahamuhammad5454]

he is the kind of guy who could be able to break down a plane and build it back up

[@emmajohnson6885]

Dynamic equilibrium: - closed system - rate of forward reaction = rate of backward reaction - concentrations of reactants and products stay constant

[@zafrinzamanmithila6246]

Well can you please explain me what it means by "Rate of forward and backward reactions are equal" and why this takes place. I would be very grateful if you reply.

[@abigailblackwell4454]

@@zafrinzamanmithila6246 did u ever find out lol

[@O6787R]

@@zafrinzamanmithila6246 this is such a late reply but basically forward and backward reaction means that they occur at the same rate. So the reactions are both taking place in both directions. If a reversible reaction occurs in a closed system (closed system means that nothing can enter or leave) then the reversible reaction would reach a 'state of dynamic equilibrium'.

[@Celeste_51]

@@zafrinzamanmithila6246 I think it’s that the reactants are forming the products in the forwards reaction at exactly the same rate as the products are forming the reactants in the backwards reaction ( I know this comment is 2 years old it just helps me remember to comment)

[@Fishfood821]

@@zafrinzamanmithila6246 u find out?

[@Tozyro]

do a behind the scenes video

[@fazeelatali2677]

One hour before

[@lanamotaz8903]

less than a week before paper 4

[@HxnnahTheHajPetter]

or a bloopers vid :)

[@cypher_guy3752]

300th like

[@robyoncrakk9198]

That would be cool asf

[@artinthearchives]

why do i learn more in 3 minutes than what i learn in an hour at school

[@keithhinklberry2958]

I learn more cos he explains it much better

[@KleptomaniacJames]

Because he's british

[@dantheman2538]

@@KleptomaniacJames who teaches you lmao

[@selasi3187]

so true

[@jamesflach5618]

there are always hundreds of these comments every video. it's cause you just don't concentrate with your teacher

[@Iman-sr7ih]

This is world class teaching hands down.

[@Jimajimajim]

This is my quarantine chemistry lesson

[@hamzasherasmat6593]

noice

[@velorien9965]

My science teacher sent this to my class during the quarantine but I'm pretty sure she wants us to do the experiment. At home.

[@JohnWick-rw6gz]

lmao

[@Shamsul_Gaming]

Hahaha same

[@Bzrzerk]

hahahaha i love it when he points

[@mayhemmbtw]

Thanks, you somehow managed to explain this concept so clearly in just 4 minutes!

[@wardyyk9288]

I do a level chem and I’m still watching this

[@charusmita6750]

what do u mean by A-LEVEL chemistry sorry, pls bare with me i m new in UK and to the GCSE board

[@katiestanford1849]

@@charusmita6750 yeah

[@jackqueslack2339]

@@charusmita6750 A-Level education (from what I know) is like the GCSEs but for college and sixth form

[@yedunno4056]

Who's here for cramming for test tomorrow

[@tobyf6414]

These videos give me life

[@sam.arrow.]

ok now this is epic

[@leahmosomba1237]

Without ur videos I am dead meat😢. Thanks a lot

[@AH4Z0]

This topic is the hardest/most difficult on the paper 2

[@shaeeeeeeeeeesh9858]

its ez bro wdym

[@Nilashaaaaa]

@@shaeeeeeeeeeesh9858 init

[@srushtipatil4978]

Yeah, the videos from 2018 are really helping

[@Aaminah-bu5gv]

i love chemistry so much>>>>>

[@14riin]

WHO HERE IS DOING WORK IN QUARANTINE ::((

[@abdulrahmanibrahimalmahdy2794]

yes sir

[@holasoyhann]

DO MORE WURKK

[@ben0345]

Thanks so much, i didn't understand this at all but now i do

[@aizakhan7134]

This teachers is actually soo good man I learn in 3 minutes what teachers waste an hour on 😂😂

[@nikkirabie7921]

My fate lies entirely in your hands

[@mub1012]

It helped me a lot understanding the topic

[@tomp3140]

Bro wag wan my teacher loves this dude

[@saraelmakkyelbadawy1124]

Thank you , for your interesting videos

[@alannasenior6502]

Hello, sir. Thank you very much for all of the effort you put into these videos! I am doing edexcel so is the content any different really to these videos (which are AQA I presume ?)

[@lankeylad]

Not really, the only thing that is gonna be slightly different is the way exams are marked, and what practicals are more highly focused upon

[@bellathorn7100]

You will have sat this by now but if it helps anyone, i do edexcel and my teacher swears by these videos so i assume the content is correct for our exam board.

[@rohan_n23]

thanks, Sir Shaun Donnelly

[@ernslvr]

Sir what’s your favourite science?

[@Freesciencelessons]

My favourite science is Biology but my favourite to teach is Chemistry.

[@roku6194]

Like if this guy has saved ur ass more than once lmao

[@oosoo8277]

0:35 hahahahaha I love the fact that he specifies that the arrow points in one direction only 😂

[@atiarimi5994]

Thank you for making these videos

[@unscriptedsahil]

007 doing great job at teaching us

[@mamtasingh4597]

It helped me lot

[@FlixRacing]

Thank you❤️🙏

[@olivercadman3595]

awsome vid

[@SA-gv2yn]

Only 2 exams to go bois!

[@lewis7695]

cheers Shaun

[@akase_1395]

Nice

[@Userr1029]

hi, your videos are really helpful but I just wondering where can I find the revision guide

[@sah5450]

linked in the description

[@gskagan8824]

Awesome

[@me-so4ez]

do we have to know how to figure out which side of the reaction is exo and endo thermic????

[@ZainZahid8880]

do i need to memorize the ammonium chloride and the hydrated copper sulfate equations?

[@mahn08r]

flashcards

[@lucahervada3697]

CHEM TMRW ANYONE?

[@boo1290]

Y e s :)

[@arjunmankoo6217]

Yes 1 year later

[@amtulkafi6331]

are you going to make a video on dynamic equilibrium and le Chatelier's principle ?

[@Freesciencelessons]

All of those videos are already done and are in the Chemistry 2 section.

[@qqq5986]

Nice video AMAZING VIDEO!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[@paulakonefal6897]

Excellent thank you.

[@HarrySpencer]

do you need to know WHY the hydrated copper sulfate changes color?

[@harrythompson3983]

nope

[@abmalik_9770]

Because it is getting hydrated and it turns blue when it is hydrated (water)

[@kavipanchmatia1004]

awesome

[@mounirmechkour1579]

Please, I am begging you, use sulphate and sulphur instead of sulfate and sulfur. It hurts to see.

[@JorisBohnson52]

Mounir Mechkour no because that’s wrong

[@aptonymic3014]

@ sulfer is american, sulpher is british, although i think AQA uses sulfur, which is odd

[@darshgudka2677]

for the effects of certain environmental changes like pressure for example, what does it refer to when it's talking about favouring the left or the right?

[@queeny5613]

thanks so much

[@icarussoph]

whats the diff between dynamic equilibrium and equilibrium?

[@mohsaj7652]

If for both endo and exo, the same amount of energy is transferred, doeant tjat mean the reaction is neutral as no energy change occurs meaning that the reaction is at equilibrium???

[@AryanaSreshthaReede]

At equilibrium, the energy is gained by one side of the reaction to give off the other side of the reaction, and energy is lost by the other side to give off that another side of the reaction, happening at an equal rate. Meaning energy is gained and released at an equal rate at equilibrium.

[@masteroogway6994]

For the reaction where the reactants and products are in a sealed container, how can we heat and cool them at the same time in order for equilibrium to happen?

[@abdulabuzukhar8518]

at 2:20 i think the reaction is exothermic because when we were heating it, were putting energy to the surrounding but endothermic is transferring energy from the surrounding

[@Freesciencelessons]

If you heat a reaction then you are transferring energy to that reaction. That could be activation energy or the reaction could be endothermic.

[@fireemperorzuko8756]

Dr Donnelly doesn't make mistakes.

[@Ann-qz2jx]

Sir do you teach A level science as well?

[@Freesciencelessons]

Yes you'll find A level Biology and Chemistry playlists on my channel.

[@aqsaarfan7550]

will you be able o do newtons 3 rules please?

[@Freesciencelessons]

Yes, they'll be coming up in my paper 2 Physics videos, which I'll be uploading around December.

[@kashish2979]

have you finished doing the physics p2 content?

[@Freesciencelessons]

No not for a while yet. I've got about twenty more videos to do.

[@Tozyro]

hard work, Shaun. 20 videos is a lot man.

[@sith_lord_destructionxx9493]

Collab with ksi bro

[@fireemperorzuko8756]

Ksi isn't famous enough for Dr Donnelly

[@elizabethwright568]

Good luck everyone for tmrw

[@cyberia___]

Mr Badman

[@techcombo5943]

Legend

[@hannahabdi1315]

do you also cover triple content in rates of reaction?

[@tiraminess]

does anyone know how equilibrium shifts?? i’m really stuck on that

[@chroniclesofangie2762]

It shifts to oppose the change.

[@Charlotte-hf5jz]

how does the reaction get hot in an exothermic reaction i’m confused

[@rageshk7828]

The reaction gives out more energy than it takes in. The heat given out is the excess energy.

[@SooofaPlayZ]

cramming

[@spaghettichild669]

while the video is playing type 'awesome' on your keyboard and the progress bar goes rainbow :)

[@diabrendy3607]

my lord

[@kixru2870]

Ello mate

[@jynxoris8552]

lol 3 hours for exam

[@l8tonk720]

Gl today lads

[@lailabaig1836]

ReAKTions😂😂😂

[@frostfnbr]

bros an npc joking

[@dollymae8740]

awesome

[@lucahervada3697]

CHEM TMRW ANYONE?

[@adrian-eh2ui]

awesome