I've got some good resources for the reactions of copper and chromium if anybody wants them? Its something they like to ask tbh its probably better if you learn the reactions! :/ that's what I've done!!

Reply 2

cerlohee

OP

16

Original post by bladex

I've got some good resources for the reactions of copper and chromium if anybody wants them? Its something they like to ask tbh its probably better if you learn the reactions! :/ that's what I've done!!

Yeah thanks that would be amazing! Could you post them here?
Also could you link this thread in the unit 4 thread? :3

Reply 3

Tim4242

1

ImageUploadedByStudent Room1428798930.519853.jpg

So, I have been trying to solve this problem using molar volumes and can't think of another way of doing it. I would really appreciate it if someone could explain why the answer is D.

Posted from TSR Mobile

Reply 4

Wannabe007

2

Original post by bladex

I've got some good resources for the reactions of copper and chromium if anybody wants them? Its something they like to ask tbh its probably better if you learn the reactions! :/ that's what I've done!!

Oh, yeah. I definitely need some extra memorising on that part. You're kind to share them :biggrin:

Reply 5

bladex

2

Original post by Wannabe007

Oh, yeah. I definitely need some extra memorising on that part. You're kind to share them :biggrin:

Chromium

https://www.google.co.uk/url?sa=t&source=web&rct=j&ei=iEgxVfeKGsLTaJKJgWA&url=http://www.aclc.co.uk/RSSFeed/SubjectWebpage/P16%2520Chemistry/StudentsResources/Chem%2520Factsheets/75%2520CHROMIUM.pdf&ved=0CCcQFjAE&usg=AFQjCNGYTIPW_I6zCrHVCSFdyQkIk_1b8Q&sig2=FVM0j3vKSMDY6DxzrU9mdA

Copper

https://www.google.co.uk/url?sa=t&source=web&rct=j&ei=JUkxVY6jEsrpaPm3gfAE&url=http://www.aclc.co.uk/RSSFeed/SubjectWebpage/P16%2520Chemistry/StudentsResources/Chem%2520Factsheets/83%2520copper.pdf&ved=0CCIQFjAB&usg=AFQjCNG3W1pGxScKcqx1A5xaQZq5BonSqw&sig2=8bz5wnHeA4UAjUTRVqMHNQ

(edited 9 years ago)

Reply 6

Wannabe007

2

Original post by bladex

Chromium

https://www.google.co.uk/url?sa=t&source=web&rct=j&ei=iEgxVfeKGsLTaJKJgWA&url=http://www.aclc.co.uk/RSSFeed/SubjectWebpage/P16%2520Chemistry/StudentsResources/Chem%2520Factsheets/75%2520CHROMIUM.pdf&ved=0CCcQFjAE&usg=AFQjCNGYTIPW_I6zCrHVCSFdyQkIk_1b8Q&sig2=FVM0j3vKSMDY6DxzrU9mdA

Copper

https://www.google.co.uk/url?sa=t&source=web&rct=j&ei=JUkxVY6jEsrpaPm3gfAE&url=http://www.aclc.co.uk/RSSFeed/SubjectWebpage/P16%2520Chemistry/StudentsResources/Chem%2520Factsheets/83%2520copper.pdf&ved=0CCIQFjAB&usg=AFQjCNG3W1pGxScKcqx1A5xaQZq5BonSqw&sig2=8bz5wnHeA4UAjUTRVqMHNQ

Thank you SO much ! :ahee:

Reply 7

bladex

2

Original post by Wannabe007

Thank you SO much ! :ahee:

No problem some of it might be too much for what we need to know but some of it is really useful :smile:

Reply 8

fictioned

1

watching.
A2 is very frustrating, oh my.
Thank you though

Reply 9

jshah1997

hey guys...i've been trying to figure out how to solve question 23c on the june 2014 IAL unit 5 paper but I can't seem to figure it out. I tried checking the marking scheme but couldn't seem to figure out how they did it. If any of you have tried it could you please explain it to me? Thanks

Reply 10

bladex

2

Original post by jshah1997

hey guys...i've been trying to figure out how to solve question 23c on the june 2014 IAL unit 5 paper but I can't seem to figure it out. I tried checking the marking scheme but couldn't seem to figure out how they did it. If any of you have tried it could you please explain it to me? Thanks

I can remember not being able to do that question as well with the weird CxHy thing :/

Reply 11

daisychain_

13

Original post by bladex

Chromium

https://www.google.co.uk/url?sa=t&source=web&rct=j&ei=iEgxVfeKGsLTaJKJgWA&url=http://www.aclc.co.uk/RSSFeed/SubjectWebpage/P16%2520Chemistry/StudentsResources/Chem%2520Factsheets/75%2520CHROMIUM.pdf&ved=0CCcQFjAE&usg=AFQjCNGYTIPW_I6zCrHVCSFdyQkIk_1b8Q&sig2=FVM0j3vKSMDY6DxzrU9mdA

Copper

https://www.google.co.uk/url?sa=t&source=web&rct=j&ei=JUkxVY6jEsrpaPm3gfAE&url=http://www.aclc.co.uk/RSSFeed/SubjectWebpage/P16%2520Chemistry/StudentsResources/Chem%2520Factsheets/83%2520copper.pdf&ved=0CCIQFjAB&usg=AFQjCNG3W1pGxScKcqx1A5xaQZq5BonSqw&sig2=8bz5wnHeA4UAjUTRVqMHNQ

These are brilliant, thank you! Do we have to learn everything on the sheets or the reactions only?

Reply 12

bladex

2

Original post by daisychain_

These are brilliant, thank you! Do we have to learn everything on the sheets or the reactions only?

I'm only learning the reaction pathways because that's the thing they usually ask but I've took a quick look over the other stuff but haven't properly learnt it :smile:

Reply 13

frozo123

12

May anyone give me an example of a deprotonation reaction in the transition topic please?

Reply 14

Ripper Phoenix

17

Original post by frozo123

May anyone give me an example of a deprotonation reaction in the transition topic please?

Deprotonation reactions involve water ligands losing hydrogen ions (proton) to a proton acceptor such as an hydroxide ion.
[Cu(H2O)6]2+ + OH-  [Cu(OH)(H2O)5]+ + H2O

Reply 15

frozo123

12

Original post by Ripper Phoenix

Deprotonation reactions involve water ligands losing hydrogen ions (proton) to a proton acceptor such as an hydroxide ion.
[Cu(H2O)6]2+ + OH-  [Cu(OH)(H2O)5]+ + H2O

So that is never ligand exchange? correct?

Reply 16

Ripper Phoenix

17

Original post by frozo123

So that is never ligand exchange? correct?

its partial ligand exchange not full ligand exchange

Reply 17

frozo123

12

Original post by Ripper Phoenix

its partial ligand exchange not full ligand exchange

Why is it partial ligand exchange if it's technically not replacing the ligand but actually deprotonating it but looking like it has exchanged? or have I just answered my own question?

Reply 18

Ripper Phoenix

17

Original post by frozo123

Why is it partial ligand exchange if it's technically not replacing the ligand but actually deprotonating it but looking like it has exchanged? or have I just answered my own question?

good!! you got it..thats deprotonation haha not ligand exchange

Reply 19

Abi1997

2

Guys I have a question,

When you react [Cu(H20)6]2+ WITH NH40H , what is the product?
My notes say Cu(OH)2, and in excess NH4OH you get [Cu(NH3)4(H2O)2]2+.
But why is it when you add NH3 you get [cu(OH)2(H20)4].

Does anyone get what I am trying to ask? And understand why this occurs, and whether this is right.

Thanks

Edexcel Unit 5:Transition Metals and Organic Chemistry 6CH05 (15th June 2015)

What do you think the grade boundary for an A will be?

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