Year 12s: what will be the first way you research your future options? >>

Edexcel A2 Chemistry Exams -6CH04 (14th June) and 6CH05 (22nd June) Discussion Thread

Scroll to see replies

I can't remember the question, but if it was just gasses like O2 and H2 then it should be platinum. If it was an alcohol, alkaline cell it should be graphite.

Data book uses platinum electrode though

Reply 2181

lfcrules

Original post by C0balt

Can anybody's school email Edexcel about the cisplatin [CuCl4]2- question. [CuCl4] 2- is supposed to be tetrahedral but they said it was the same shape as cisplatin which is square planar.

How many marks was it for drawing the thing. I drew the tetrahedral molecule

Reply 2182

Wunderbarr

Original post by C0balt

It was so wrong wtf

It was just a case of "you'll just have to accept this and move on".

As long as your answer was correct within the confines of the question though.

Reply 2183

Don Pedro K.

Original post by C0balt

Can anybody's school email Edexcel about the cisplatin [CuCl4]2- question. [CuCl4] 2- is supposed to be tetrahedral but they said it was the same shape as cisplatin which is square planar.

Lol I know right but I just rolled with it like "kay Edexcel dis is wrong buuuut"

Reply 2184

RUNSran

Original post by C0balt

Can anybody's school email Edexcel about the cisplatin [CuCl4]2- question. [CuCl4] 2- is supposed to be tetrahedral but they said it was the same shape as cisplatin which is square planar.

yeah i was confuse - I thought i learned the wrong shape the whole time

Reply 2185

razortoad

Original post by C0balt

It was so wrong wtf

yeah exactly!

Reply 2186

Wunderbarr

Original post by razortoad

I gotta say that the synthesis question was a nice 5 marker :biggrin:

1) firstly acidified dichromate + reflux (full oxidation)
2) PCl5 to form the acyl chloride (I named it as Benzoyl chloride)
3) Finally NH3 to form the benzamide and hcl

:biggrin:

Ah Shieße I don't think I put + HCl :s-smilie:

Reply 2187

C0balt

Original post by lfcrules

How many marks was it for drawing the thing. I drew the tetrahedral molecule

I drew tetrahedral too. It was 2 marks but a mark for bonding so worst case scenario we lose one mark. But it is wrong for them to mark us wrong because CuCl4 exists as tetrahedral

Reply 2188

Don Pedro K.

Original post by razortoad

I gotta say that the synthesis question was a nice 5 marker :biggrin:

1) firstly acidified dichromate + reflux (full oxidation)
2) PCl5 to form the acyl chloride (I named it as Benzoyl chloride)
3) Finally NH3 to form the benzamide and hcl

:biggrin:

Didn't ask for conditions bruh but ggwp anyway

Reply 2189

C0balt

Original post by Wunderbarr

It was just a case of "you'll just have to accept this and move on".

As long as your answer was correct within the confines of the question though.

My inner pedantic chemist didn't want to go with that bs lol

Original post by Don Pedro K.

Lol I know right but I just rolled with it like "kay Edexcel dis is wrong buuuut"

I should've made a comment about it on the paper but I didn't. Now I regret

Reply 2190

Hamzy45

Original post by C0balt

I protonated both amine and Deprotonated COOH both but I really am not sure
I think it should be fine

That's what I said

CuCl2 + 2HCl + Cu =>2[ CuCl4] - + 2H+

I did too

Same

Isn't it CuCl2 + Cu + 2HCl -> 2[CuCl2}- + 2H+

Reply 2191

Don Pedro K.

Original post by C0balt

My inner pedantic chemist didn't want to go with that bs lol

I should've made a comment about it on the paper but I didn't. Now I regret

hahahaha yeah like "m8 sort ur life out what is this"

Reply 2192

sayshay

Original post by Wunderbarr

I lost quite a few good men/women in the multiple choice section :ashamed2:

Edexcel enjoy watching us squirm. :'( Do you think it was easier than June 2015?

Posted from TSR Mobile

Reply 2193

jaylo123

it's literally drubbed into us that cis platin is sq planar and cucl4 2- is tetrahedral and then edexcel says they're the same shape?! if they can't get the questions right how are we meant to get the answers right lol

Reply 2194

C0balt

Original post by Hamzy45

Isn't it CuCl2 + Cu + 2HCl -> 2[CuCl2}- + 2H+

I think that's what I wrote
Yeah typo sorry

(edited 7 years ago)

Reply 2195

Don Pedro K.

Original post by Hamzy45

Isn't it CuCl2 + Cu + 2HCl -> 2[CuCl2}- + 2H+

Yeah I'm sure she just made a typo :smile:

Reply 2196

DesignPredator

Honestly don't think it will be 80 for A* there were too many trick questions, like the cisplatin one and maybe the graphite/platinum argument.

It did feel easier than June 15, so I reckon 76-77 will be A*.

Reply 2197

Tomasio

For the "acquiring sample of" question I could not work out if the starting impure compound was solid or liquid!

I therefore wrote out the steps for both recrystallization, and then underneath, liquid-liquid purification..... Is either of these right? and if so will I get the marks, because one of methods is bound to be wrong.
I don't know if they take away marks if you write down a right answer as well as a wrong answer. But I could not tell what the state of the starting material was, so I could not just choose one method!

Apart from that I thought the paper was fine but the multiple choice questions were horrible. What's the general consensus on the paper?