[Mintteaco]

I thought this paper was a bit hard, I gotta say goodbye to my A* and Imperial College. T-T

What's your answers for the co2 question?
I wrote it will shift to LHS first because co2 react with H2O
But the I changed to RHS as it's in solution, there are excess water. OH- is a production and will react with the acid.

And also, the Pt question, what's the byproduct in your equation?
I got H2O and H2. Can't remember the coefficient, there were some big number though.

So how did you guys do? What did you find is hard?

[sciencegeek111]

i think it was a lot easier than jan 12.
i got the orders wrong though
btw do you think if i got the 2 step mechanism right but the orders wrong i'll still lose the marks for the mechanism because it doesn't follow on from the rate equation i did?

[sciencegeek111]

loved the last question! and the ph of the buffer one

[Mintteaco]

What did you get the PH for buffer?
I got 3 something but I saw a lot people got 4 something?

[Mintteaco]

(Original post by sciencegeek111)
i think it was a lot easier than jan 12.
i got the orders wrong though
btw do you think if i got the 2 step mechanism right but the orders wrong i'll still lose the marks for the mechanism because it doesn't follow on from the rate equation i did?

I think you will get one marks. There are great chance for two marks if you didn't label the order

[Susie1993]

what did you guys get for the very last question? I got a percentage in the 60's but a lot of people are saying it was 93 or something

[Alexdaman93]

91.8%
If your answers was in the 60s it sounds like you forgot to inclue Na2 in the mass you multiplied in the no. moles by?

[Kkkkkkkk]

(Original post by Susie1993)
what did you guys get for the very last question? I got a percentage in the 60's but a lot of people are saying it was 93 or something

I got 91.77 =\

[jessicad123]

I got 91.95, hopefully they will mark it correct between say 91-92 to allowing for rounding??


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[Mintteaco]

I think 91.8% was right
That's what I got

[jessicad123]

Some people got 91.5 some 91.77 some 91.95 hmmmmm "/


This was posted from The Student Room's iPhone/iPad App

[chloe45]

hey guys there's a bigger thread at http://www.thestudentroom.co.uk/show...e=238&page=238 if youre looking for more possible answers