Quick revision - Transition elements (reactions)

All of the transition element reactions required for OCR A. Video includes ligand substitution reactions (inc haemoglobin) and precipitation reactions, chemical equations and colour changes.

[@MrJason005]

Probably one of the hardest parts of paper 1

[@ashikayeasmin2637]

OH MY GOD!!!!!!thank you so much!my exam is in 10 days and this was so helfulll!!i honestly think your channel deserves more subscribers and views!!!!! because WOW!what an explanation!am so happy i found thesee!thank youuuuu once again!

[@MaChemGuy]

Ashika Yeasmin Very kind of you to say. Glad you’re finding the videos helpful 😊

[@joshnewsom6668]

I find other chem youtubers boring but your accent makes it interesting thanks

[@MaChemGuy]

Josh Newsom Haha!! Cheers for that

[@Lizyouu]

hahaha me too

[@abdurrahmanchowdhury5120]

where did NH4+ come from in the reaction of hexaaquacopper with ammonia?

[@harunmohamed9099]

His sir is there a method on how to do these equations or is it just you have to remember them ?

[@arjunpatel8247]

Thank you Are these all ionic equations ?

[@vateoff]

Thanks alot exam is in 1 week

[@sv8972]

Sorry Sir to keep bothering you. But on the spec it says: "Redox reactions (k) redox reactions and accompanying colour changes for: (i) interconversions between Fe2+ and Fe3+ (ii) interconversions between Cr3+ and Cr2O72- (iii) reduction of Cu2+ to Cu+ and disproportionation of Cu+ to Cu2+ and Cu " Do you have a video on this?

[@a1.ghost.]

Yh I've been searching for videos on that for ages too but no one seems to have anything or kno much about it...

[@cha0spretzel-534]

yeah i can’t seem to find one about it either :/

[@orlaithrees2528]

@@cha0spretzel-534 Hey, I haven't seen any videos on these either but if you search 'OCR A Chemistry Transition metal colours' there should be a link which has like images of test tubes with the colours & relevant ions. These are all on there :)

[@shroomer_jim]

Thanks for the video, it's incredibly helpful with the exam in only 3 days time! However I was under the impression aqueous Cr3+ is green!!?

[@MaChemGuy]

Asdapo It’s actually purple/violet but any impurities present make it look green. They accept either colour

[@shroomer_jim]

MaChemGuy Thank you so much i was beginning to panic, ocr spec said green and didn't say why it conflicted with other sources. One less thing to worry about!

[@tgdhsuk3589]

you should do the set 1 set 2 and 2017 papers aswell im so scared i dont know what to revise am i correct in thinking there is nothing organic in the first paper

[@damnlookatme6900]

At 5:00 do we have to know all 3 of them reactions or can we just remember the simplified reaction?

[@MaChemGuy]

Simplified one is generally accepted. So long as you're aware that the addition of aqueous ammonia leads initially to the formation of the hydroxide precipitate

[@damnlookatme6900]

Also for chromium and excess ammonia can u write [Cr(h20)6]3+ +6NH3 = [Cr(NH3)6]3+ +6H20 instead of what u wrote?

[@MaChemGuy]

Yeah

[@pokeninjaful]

When reacting with excess OH-, would you have to write Cr(OH)3(H2O)3 + 3OH- or could you just write Cr(OH)3 + 3OH- ?

[@MaChemGuy]

Either is fine

[@anoukcavendish972]

are these all the ones we need to know for the exam? thanks for all your help!!

[@MaChemGuy]

Anouk Cavendish I think I’ve covered just about everything, still more to make though. You’re welcome

[@anoukcavendish972]

@@MaChemGuy more reactions or just more videos on TE topic?

[@ak-7865]

Do I have to put pale blue or can I just say blue 🤔 ?

[@MaChemGuy]

Blue is fine

[@insert_username9003]

paper 1 tomorrow

[@joshoddy9560]

shitting myself

[@oswin4715]

Ree hope it goes well

[@a1.ghost.]

Last minute gang wya

[@smani7637]

yeet imma fail horribly today lmao

[@a1.ghost.]

@@smani7637 Nah we got this

[@oswin4715]

Yeeet im bricking it I hope most of it is maths like ph and titration shit lmao

[@a1.ghost.]

Fml I change my mind we don't got this

[@oswin4715]

@@a1.ghost. fully fucked it I'd be lucky to get a C rn

[@tgdhsuk3589]

is 6:51 the wrong way round?

[@MaChemGuy]

LegendaryVegeta nope