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Edexcel A-Level Chem Paper 2 Advanced Organic and Physical Chemistry [Exam Chat]

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If it is primary it would go to a carboxylic acid which has 2O, it was secondary so it went to a ketone with 1 0, it isnt an aldehyde because it said it dorsnt oxidise further so it must have been secondary alcohol and chloroalkane.

i swear the second formula it gave had 2 O's so it couldve been a carboxylic acid?

Reply 401

zws

Original post by ProXMist71

From an alcohol, 2PI3

I put pi3 but pmt notes says p and i2 as well as pi3 – do u think they would both be allowed??

Reply 402

eathsrtbsrtb

Original post by ProXMist71

From an alcohol, 2PI3

for the marks you had to say iodine in red phosphorous it came up in previous years and thats the MS

Reply 403

ProXMist71

Didn’t the question say give the name or the reagent? So would 2PI3 be wrong??

Reply 404

thatonechemist

Original post by ProXMist71

Didn’t the question say give the name or the reagent? So would 2PI3 be wrong??

Technically you are correct however you are supposed to use red phosphorus and I2 to form the PI3 probably bc its rlly unstable or smth so you cant use it directly

Reply 405

pasankalla

guys do u have any tips to memorise transition metal colours and reactions?

Reply 406

arls99

Original post by pasankalla

guys do u have any tips to memorise transition metal colours and reactions?

Honestly, I just kept writing the equations down, with their colours, multiple times a day until it stuck with me. Keep doing it. Sadly i think that's the only way in transition metals

Reply 407

carbogattoion

Original post by cyanide05

yeah i multiplied it by 28 and got 38.4% i don’t know though

the thing you titrated was the ammonia (or something, the point was that there was 1 mole of N in whatever was being titrated) so the moles you found were moles of ammonia, and as each N from the molecule forms 1 molecule of ammonia they're equivalent (so you just times by 14 to get the mass of N in the molecule)
at least that's what I'd guess, my memory is pretty patchy.

(edited 10 months ago)

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