OCR A-level Chemistry A Paper 2 - 16th June 2025 [Exam Chat]

It couldn't be, otherwise there would have been two broad singlet peaks with a peak integration of 1 on the proton NMR spectrum.

oh lol icl i just didn’t know it had to be broad for OH i never remember learning that but oh wellll

Don't worry too much, paper 3 still to go! Hopefully it will go well.

Can anyone help me… I’m so confused when are u meant to round ur intermediate numbers in calculations cos every mark scheme is diff my teacher said to always round to min 4SF but some mark schemes don’t round at all and them some do pls help😔😔😔😔😔😔😔

If they want a specific sig fig they let you know in the question, but I think 2/3 sig fig is fine

In the MCQ was the NH protonated to NH2 or NH3+? (I put NH3+)

In the MCQ was the NH protonated to NH2 or NH3+? (I put NH3+)

Does anyone have any advice on what to revise for tomorrow's Paper 3?

In an acid hydrolysis or alkali hydrolysis? If it was an acid it should be NH3+ but if alkali it should be nh2

It’s so stupid I picked C , because in acid hydrolysis 4 markers it accepts nh2 and nh3+.

transition elements most likely going to be a 6 marker, pv=nrt, Hess cycles, born haber cycles, titrations, kc.

i think most ppl would have been caught out and probably picked C but i knew it was B though and like neareer to the end i just had extra time to look over my work and was doubting myself but yeah the answer was B. Dont worry it was only 1 mark

They have to accept both coz they accept nh2 in markschemes. They can’t pick and choose