[|Alex]

I thought this exam was really quite easy compared to past papers.. not many stretch and challenge questions

What did you think?

Questions that were hard for me was the last one (naturally) and the effect no equilibrium of CO2

[Photox]

Yeah I liked it, good easy exam, long questions were gifts, that equilibrium and CO2 i had no idea, I blathered about potential carbonic acid effecting the presence of OH- ions but genuinely i didn't know so that's not right, but yeah, happy with that exam, very happy

[waxcrayons]

I thought it was okay-ish :/

what did people get as the orders for the rate equation? messed up the kc big time haha

fingers crossed though!

[gerrard1892]

(Original post by waxcrayons)
I thought it was okay-ish :/

what did people get as the orders for the rate equation? messed up the kc big time haha

fingers crossed though!

I got 1st order for both, yeah same messed up the kc, don't know what i was thinking. The rest went ok, I think i dropped one on the ionic equation I thought it just wanted a balanced equation not an ionic one.

[AStephenson8]

It could have been a lot worse, overall I'm quite pleased The buffer confused me a bit, but I sorted something out by the end.. and the CO2 thing on Q7 I had no idea, ended up blabbering about something :') Hopefully only lost a few marks here and there though

[waxcrayons]

(Original post by gerrard1892)
I got 1st order for both, yeah same messed up the kc, don't know what i was thinking. The rest went ok, I think i dropped one on the ionic equation I thought it just wanted a balanced equation not an ionic one.

cos my friend said he got first order for no and second order for the o3 one or something but i got first for both of mine too

[gerrard1892]

(Original post by waxcrayons)
cos my friend said he got first order for no and second order for the o3 one or something but i got first for both of mine too

Yeah its first for both, I confirmed with my tutor

[Aanisah94]

What do you think the grade boundary is likely to be?

[jessicad123]

How did you mess up kc?


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[alice.babee]

I thought this exam was alright :O I liked the pH questions, and the very last question was sooo lucky cos I'd spent a good four hours revising those questions a few days before:|
I had no idea what to write for the reaction between platinum and that water of reagia thingy, or what adding CO2 to the system would do to the position of equilibrium :/
Don't think I've done fantastically well but don't think I bombed it either (: x

[AStephenson8]

(Original post by Aanisah94)
What do you think the grade boundary is likely to be?

Personally, I think it'll only be slightly below 80 for an A and so on.. It wasn't too bad, although they always go down a bit :P


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[jessicad123]

What did you two think of the bidentate ligand thing? I thought it was strangely easy really just drawing the ligands?


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[tallen90]

(Original post by Aanisah94)
What do you think the grade boundary is likely to be?

I'd guess mid to high 70s for an A. It was a pretty straightforward paper.

That said, did anyone mention hydrogencarbonate for the second-to-last question (where CO₂ affects the equilibrium)? I came up with a wonderful answer where CO₂ reacts with OH^- to make HCO₃^-, but really I was just BS'ing. But it would be nice if I'd actually got it right by some miracle

[tallen90]

(Original post by jessicad123)
What did you two think of the bidentate ligand thing? I thought it was strangely easy really just drawing the ligands?


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Yeah, it was a pretty easy question, but don't forget it was only worth 2 marks.

[tallen90]

(Original post by alice.babee)
I thought this exam was alright :O I liked the pH questions, and the very last question was sooo lucky cos I'd spent a good four hours revising those questions a few days before:|
I had no idea what to write for the reaction between platinum and that water of reagia thingy, or what adding CO2 to the system would do to the position of equilibrium :/
Don't think I've done fantastically well but don't think I bombed it either (: x

For that equation, I got Pt + 6HCl + 4HNO₃ --> H₂PtCl₆ + 4NO₂ + 4H₂O

(or something like that)

[jessicad123]

Yeah I guess so, I'm trying to think of what the longer questions were but I think they were just maths questions for the 5/6 mark ones...


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[alice.babee]

(Original post by tallen90)
For that equation, I got Pt + 6HCl + 4HNO₃ --> H₂PtCl₆ + 4NO₂ + 4H₂O

(or something like that)

Oh GOD I got nothing like that haha! I was going to put something like that but then in the question it said it was a mixture of hydrochloric acid and nitric acids so then I started thinking about HNO₃ and HNO₂ and all that :/ oh dearrrr!

[Pri0103]

What did you guys get for the Kc questions. Lots of people are saying 0.9 something, but I got 1.2 something ?!