That's also true, but I took it as you know what mass you need to make the solution. It was a six marker, so if that didn't need to be included, I'm not sure what the other marks were needed to be.
well i truly hope that the mark scheme will be kind in that question... there was a similar practical procedure question about distillation in the 2nd specimen paper and if i recall correctly the mark scheme wasn't really specific about marking points :/
Isn't the MPC question about the sulfuric acid D? because i remember it was between KOH and Ba(OH)2? if H2SO4 reacted with KOH it would form K2SO4 and H2O, and that would need to be balanced to 2KOH. but when H2SO4 reacted with Ba(OH)2 there was no need to balance and the moles of the barium hydroxide was 0.05 as well?
Oh I believe you're right. I forgot which one I put down for that one, either it was D or A. Thanks!
Oh **** how many marks will lose? Got 149 for the second part though
to be honest i nearly did the same mistake lol. But i think you'd lose maybe 1 mark, 2 max. AQA did it on purpose to trick students so a they'll award a mark at least as many people will have done the same i assume
for pv=nrt what was the appropriate number of significant figures? all the values given were in 3 s.f. but temperature was 300K and i wasn't sure if that was 3sf or 1, so i put my final answer as 1sf..
to be honest i nearly did the same mistake lol. But i think you'd lose maybe 1 mark, 2 max. AQA did it on purpose to trick students so a they'll award a mark at least as many people will have done the same i assume
lol I thought the trick was the 'rough titre' but AQA aren't that stupid.