AQA CHEM1: 15th May 2012

I put H2S04 for that one.
And i'm pretty sure it is a (camping) fuel, although I didn't write that myself. I was a bit of an idiot and just wrote 'used to make polymers' lol.
Wasn't thinking straight.

For the concentration question I did have 2.21 but then I realised the question said that the volume was 500cm3 of solution, not of hcl. So I divided 500 by 4 then timsed by 3 as it was a 3:1 ratio and got 2.95

But everyone seems to have put 2.21 I just stop thinking so much and go with my initial answer. What a nightmare

For the concentration question I did have 2.21 but then I realised the question said that the volume was 500cm3 of solution, not of hcl. So I divided 500 by 4 then timsed by 3 as it was a 3:1 ratio and got 2.95

But everyone seems to have put 2.21 I just stop thinking so much and go with my initial answer. What a nightmare

what did everyone get for the functional group isomer for bute 2 ene

what did everyone get for the functional group isomer for bute 2 ene

what did everyone get for the functional group isomer for bute 2 ene

What did everyone get for the calculations in question 5? I saved the answers in my calculator.. Got 2.81g for the first one, 2.21mol/dm^3 for the next one, 8.98% for the atom economy and B2Cl4 for the molecular formula one.
Thought it was an ok paper but I panicked in the same way I did in January because I was running out of time..

I did the same. It did say 500cm^3 of solution - so i think we're right?

But-1-ene is what I put...? Does anyone remember how to do the relative abundance of Rubidium question where one isotope was 2.5x greater than the other? What did people times (x) each isotope by? Thanks

That's what I thought, but the question was only 4 marks, and that seems a bit too much for 4 marks doesn't it?

But-1-ene is what I put...? Does anyone remember how to do the relative abundance of Rubidium question where one isotope was 2.5x greater than the other? What did people times (x) each isotope by? Thanks

didnt it say 5000?

i did (85 x 2.5) + (87 x 1) all divided by 3.5 and got around 85.6 i think?

I put H2S04 for that one.
And i'm pretty sure it is a (camping) fuel, although I didn't write that myself. I was a bit of an idiot and just wrote 'used to make polymers' lol.
Wasn't thinking straight.

i did (85 x 2.5) + (87 x 1) all divided by 3.5 and got around 85.6 i think?

Well, I thought that was without doubt the hardest unit 1 test from all the past papers. Clearly there has been a massive change from before the Jan paper, in terms of difficulty of the test. The formula for sodium borate is Na2B4O7... Lets be honest ... who got lucky?