F334 (19/06/2013 9:00AM) - Salters Chemistry (Chemistry of Materials) Revision Thread

I got this too! Except I also drew lines in for the hydrogen atoms. The only reason why I remember this is because I viewed a video about this type of Isomerism in November... absolute miracle I remembered it.



H2O of order 2, CH3Cl of order 1, overall three. I was super confused about this as well - who the hell practically raises their concentrations of a solution by 1.5? If anything, the investigation taught me that even doubling your concentrations are hard enough.




MnO4- is purple in colour. The only reason why I remembered that is because my new Chem teacher was hell bent on doing EVERY SINGLE PRACTICAL in the textbook.

I think it will. But we have no idea how everyone did across the country, so we'll just have to wait and see. Compared to the Jan paper, I think this was a broadly similar paper

I'm sure the question asked how the mechanism was wrong didn't it???

Yes I know but if you watch this video

http://www.youtube.com/watch?v=eVomKthCP_k

it shows that the solution remains colourless after addition of Mno4- (somewhere around the middle they stop adding Mno4 and it turns back from purple to colourless

I said the solution turns pink from colourless

I only remembered it because there was something like that in the F335 paper in Jan 2013!

damn iv made soo many silly mistake aswell :/ guess we just have to wait till results day

The question was why is it right and I think it was 1 mark?

....And this is why I hate chemistry titrations. In fact, this is why I hate chemistry end of.

I think the other question said "How does the reaction support the scientists hypothesis," or something like that.

Was it first order and then 2nd order for h20 and overall was 3 right ?


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Didn't it say:

The mechanism is wrong or something

Use the orders of reactions and equations to explain why

for the 1.69 question, would 1.7 have been more "appropriate"? i wrote 1.69 but i feel like 1.7 would have made more sense...

nope it said why is it the correct mechanism

for the 1.69 question, would 1.7 have been more "appropriate"? i wrote 1.69 but i feel like 1.7 would have made more sense...

Three significant figures, in line with all the other values given in the text. You got it right =D

Yes, 25.0 and 0.00500 are somehow 3 significant figures as all.