Oh was that the one that wanted you to prove the molecular formula for the compound was C6H14O2? It was 3 marks. It gave you the percentages of Carbon and Hydrogen (so you could work out Oxygen) and then gave you an m/z ratio. Totally messed that one up. Couldn't do it. Did anyone manage to do it?
I'm guessing I've got 2 of the marks then. I don't know whether it's a bad thing or a good thing I didn't have to resit unit one because I would've actually have revised empirical formula then, I tried to work out an empirical formula with minimal confidence in what I was doing, then I think I did the last step the wrong way around...thanks aqa
lol yeah I had to resit chem 1 as I got a B last year but kinda glad I did now or I probs wouldn't have got that question. Times like this make you realise how unfair life is, I'm pretty sure chem 4 is NOT meant to be synoptic??? What's the point in modules omg
lol yeah I had to resit chem 1 as I got a B last year but kinda glad I did now or I probs wouldn't have got that question. Times like this make you realise how unfair life is, I'm pretty sure chem 4 is NOT meant to be synoptic??? What's the point in modules omg
I agree, if it is a CHEM4 paper you should be tested in CHEM4 content. Nothing synoptic worth that many marks and don't even get me started on some of the questions that were CHEM4 based but just utterly ridiculous.
This poor excuse of a paper has literally cost me my grade for university and I'll be literally heartbroken if this paper is the reason I don't get in. I literally got 85 and above in all the other past papers for this unit but I think I've got about 67/68 in this. And my CHEM5 will probably not be enough. I understand that obviously the content has to get harder over the spec lifetime but this was a whole new level.
First question 1 mark, second question 1 mark, third question 2 marks The salt was sodium ethanoate (1) Why is chloroethanoic acid stronger than ethanoic acid was 2 marks Answer: Cl withdraws electron density, so O-H bond weaker OR reduces negative charge on COO- OR COO- more stable (from a previous markscheme)