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# Today's AQA CHEM 5/6... watch

1. (Original post by zazy)
Aha did you get -164.something for qn 1 the enthlapy of sln?
Yeh
2. Yeah I think I got -164 for /\Hsol
3. (Original post by imasillynarb)
Yeh
did you get 1.7 for the last part of the first qn section B? PH=1.7
4. What about the Elements of the period 3 Oxides?

I got: Na, P, Si

Anyone else?
5. Yeah I got those elements.
6. (Original post by imasillynarb)
What about the Elements of the period 3 Oxides?

I got: Na, P, Si

Anyone else?
aha yeahhhhhhhhhhhhhh
7. Although I couldnt write an equation for Si's acidic properties or whatever
8. (Original post by imasillynarb)
What about the Elements of the period 3 Oxides?

I got: Na, P, Si

Anyone else?
Yup. Acid = H3PO4
9. (Original post by imasillynarb)
Although I couldnt write an equation for Si's acidic properties or whatever
Is sio2 + 2OH- ---> sio3 2- +H2o correct???
10. (Original post by zazy)
Is sio2 + 2OH- ---> sio3 2- +H2o correct???
I did that (well not an ionic equation but basically the same thing) and below it wrote acid + base ---> salt + water.
11. is got SiO2 + 4H20 --> Si(Oh)4 + 2H+ + 2OH-

which shows its acidic i think
12. (Original post by jay9386)
is got SiO2 + 4H20 --> Si(Oh)4 + 2H+ + 2OH-

which shows its acidic i think
There are many ways to prove that anyway, what did you do with question 1?
13. (Original post by zazy)
There are many ways to prove that anyway, what did you do with question 1?
How many peaks did you all get for the nmr of butanedioc acid?
14. ne1 write down the answers i wrote um for first 20 odd

15. (Original post by zazy)
How many peaks did you all get for the nmr of butanedioc acid?
2
16. (Original post by jay9386)
ne1 write down the answers i wrote um for first 20 odd

http://www.uk-learning.net/t51623.html
17. i got Na and Si, but really cant remember the middle one!! WHat did it ask?!
18. (Original post by kingpong)
Crapola, I got 2.2 ish moles.

me too actually, lol
19. (Original post by Resonance)
That question about What Kind of acidity is this? (referring to FeCl3) was great.
i got confused with the acidity thing......i mean what sorts of aciditys r there?!
20. lewis/bronsted lowry i think

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