OCR A-level Chemistry B (Salters) Paper 1 - 10th June 2025 [Exam Chat]

What was the nmr structure, I got phenyl propanoate but some getting ethyl benzoate

When you increase the mass of the solute, you are essentially adding more solute molecules that need to be dissolved. This means the solution will absorb more energy from the surroundings, so final temp will be lower, so temp change is higher. dividing by a larger number (larger temp change) reduces the % uncertainty, search it up

Yeah 4 marker +24.something to 3sf

it's to 2 s f because it said appropriate s.f and the method had recordings as to 2. s.f (this is why i hate chem and will always favour maths)

Wait I thought there is no peak between 2-3 and after 10 so I couldn't be an ester/ c.a?😭

was this the correct structure? I thought so cause 5 proton environments and benzene had 2 cause 2 close peaks? Matches the formula ig but ppl getting diff so maybe its wrong

werent there 4 environments or am i off my rocker

werent there 4 environments or am i off my rocker

what do u think grade boundaries gonna be like? 70% for A, it was 68 last yr

I'm thinking ~65% for an A*... 2024 had more accessible questions imho

I'm thinking ~65% for an A*... 2024 had more accessible questions imho

last year was 82% for an a* no way it'll drop... if loads of ppl found it had i think minimum 75% for a* and thats even pushing it.. but for sure paper 1 last year was more straightfoward

yeah last yr paper 1 separately was 89/110 for an A* so this yr it might drop to 84?

it never drops. I reckon it will go up which sucks.

hope its not ridiculously high