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

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Reply 2040

Supermanxxxxxx

Original post by Footyrulez

Ah thats what I got as well!! :smile:

Noooo was there a second. Reaction fml

Posted from TSR Mobile

Reply 2041

Funky_Giraffe

Original post by nicklongy

What did people get for the MCQ about amphoteric behaviour? Is it Zn(OH)2 beacuse thats the only one that can redissolve thus losing more protons?

Also what did people put as the catalyst for 2Ce4+ + Tl+ = 2Ce3+ = Tl3+

Yes and Fe2+ catalyst

Reply 2042

lfcrules

Original post by GrandMasti

I got 6 isomers for the MCQ about the di nitro methyl benzene

same

Reply 2043

Footyrulez

Original post by Supermanxxxxxx

Noooo was there a second. Reaction fml

Posted from TSR Mobile

second reaction gave you a negative Ecell though??

Reply 2044

Funky_Giraffe

Did people get the polychromic glasses question?

Reply 2045

nicklongy

Original post by GrandMasti

I got 6 isomers for the MCQ about the di nitro methyl benzene

same

Reply 2046

lfcrules

Original post by Funky_Giraffe

Yes and Fe2+ catalyst

do you mean fe 3+ , ii dont think fe 2+ was an option was it?

Reply 2047

Supermanxxxxxx

Original post by Footyrulez

second reaction gave you a negative Ecell though??

I didn't even know there was a second reaction though I only wrote about the +0.46 one

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Reply 2048

GrandMasti

Original post by nicklongy

Fe3+

Reply 2049

Franckenstar

Original post by Funky_Giraffe

Did people get the polychromic glasses question?

I think they gave a clue with the disproportionation stuff

Reply 2050

Funky_Giraffe

Original post by lfcrules

do you mean fe 3+ , ii dont think fe 2+ was an option was it?

Yes sorry! Fe3+

Reply 2051

lfcrules

Original post by Funky_Giraffe

Did people get the polychromic glasses question?

Oh yh lmao , remember seeing that last night in the george fcer textbook

cucl + agcl = cucl2 and Ag
Solid silver is formed so the glasses darken

Reply 2052

Funky_Giraffe

Original post by Franckenstar

I think they gave a clue with the disproportionation stuff

Ah ok. But it wasn't a disproportionation for the previous question, was it?

Reply 2053

GrandMasti

There were 3 steps in the sythesis of benzamide right? Oxidation by K2Cr2O7, then PCl5, then Ammonia to form the amide?

Reply 2054

nicklongy

Original post by Funky_Giraffe

Did people get the polychromic glasses question?

Energy from photons oxidises Cu+ to Cu2+, electron released reduces Ag+ to Ag solid, Ag solid causes sunglasses to darken

Reply 2055

DesignPredator

Original post by Franckenstar

Yeah they have to be seprerated from the chiral stuff

I just said that racemic mixture could be formed with other optical isomer which could have harmful effects. To solve this find a process which is stereospecific.

Reply 2056

Franckenstar

Original post by Funky_Giraffe

Ah ok. But it wasn't a disproportionation for the previous question, was it?

No just the definition. For the polychromic I talked about the formation of Ag solid

Reply 2057

nicklongy

Original post by GrandMasti

There were 3 steps in the sythesis of benzamide right? Oxidation by K2Cr2O7, then PCl5, then Ammonia to form the amide?

yep did the same thing

Reply 2058

Beautywithabrain

Original post by GrandMasti

Fe3+

It was Zn(OH)2 wasn't it? That's amphoteric

Reply 2059

Kitten_medic

Original post by DesignPredator

I just said that racemic mixture could be formed with other optical isomer which could have harmful effects. To solve this find a process which is stereospecific.

did anyone speak about chiral auxillaries to direct groups in specific positions?

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

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