Edexcel Chemistry A2 Unit 5 ~ Wednesday 19th June 2013 (Now Closed) Watch

Poll: How pumped up are you for this exam?-(warning)-(bad jokes arene this poll!)
"Titanium-I'm not going to corrode (even at high temperatures)" (A*) (22)
16.67%
"Benzene's my middle name, give me the paper in a week and I'll ace it!" (A) (27)
20.45%
"Yeah, I'm fairly electrophillic (positively charged) about the exam" (B) (27)
20.45%
"I'm in the middle of the salt bridge, but I will pass-eventually" (C) (21)
15.91%
"I'm feeling rather electroNegative about this exam" (D) (18)
13.64%
"Benzene, what's that?" (E) (6)
4.55%
"Chemistry, what's that?" (F) (11)
8.33%
This discussion is closed.
fempi
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#2181
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#2181
What did people put for the question about TiCl4 and TiO2?
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Qwob
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#2182
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#2182
(Original post by Bord3r)
Well I was thinking that the C=O bond splits heterolytically, and an electron pair goes from the bond to oxygen. I'm not 100% sure though.
See here
Yeah I agree. I'm confident it was A. I immediately wrote down A in the exam.

Look at page 128 in the official Edexcel A2 book. Clearly shows a double-headed arrow going from the double-bond to the oxygen.
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AS01
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#2183
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#2183
(Original post by Bord3r)
Well it gave you a ratio which was in relation to XYZ respectively so I think it did matter. You'd only lose one mark if you didn't though.
hopefully it doesn
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oli_G
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#2184
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#2184
(Original post by Bord3r)
In order of the questions on in the above pictures.

1) I put D but I'm sure the answers actually B
2) Ligand Exchange D
3) C as it is a tertiary alcohol so is not oxidised by dichromate
4) 3 which was B
5) D
6) A lower pH
7) D
8) D
9) B
10) A
11) B
12) C increase in Entropy
13) I put D but the answer is C
14) Titre of 1.8 moldm-3
For 11 the answer is A as it is a tertiary alcohol, whereas C is secondary. I agree with the rest of your answers
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Qwob
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#2185
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#2185
Predictions on grade boundaries everyone?

I hope it's the same as it has been for the last three June exams: 73 A*, 67 A. That would be beautiful. Can see it being higher though as most people here seem to have done well too.
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Bord3r
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#2186
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#2186
(Original post by oli_G)
For 11 the answer is A as it is a tertiary alcohol, whereas C is secondary. I agree with the rest of your answers
Yeah sorry I meant to edit it.
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clydeshen411
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#2187
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#2187
ahhhhh, did anyone do the international paper? Was your paper difficult?
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Qwob
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#2188
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#2188
Is this what everyone got for the NMR one? Seems quite straightforward...

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LeaX
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#2189
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#2189
(Original post by Qwob)
Is this what everyone got for the NMR one? Seems quite straightforward...
yeah that's what i got
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Bord3r
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#2190
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#2190
(Original post by Qwob)
Is this what everyone got for the NMR one? Seems quite straightforward...

:yes:
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F1's Finest
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#2191
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#2191
(Original post by Qwob)
Is this what everyone got for the NMR one? Seems quite straightforward...

yep
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oli_G
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#2192
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#2192
i can't believe i got that question wrong when it's so easy (the nmr) - i rushed it and made silly mistakes D:
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senz72
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#2193
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#2193
Well I feel dumb now. Still don't get it. Shows how dumb I am.

Posted from TSR Mobile
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LeaX
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#2194
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#2194
can anyone remember the question where it asked for the formulae for what formed when sulfuric acid and another acid (think it was an organic acid?) was added to something (think it begun with a 'b' lol). if so what did you put?
wow so vague sorry
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Blob2491
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#2195
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#2195
(Original post by LeaX)
can anyone remember the question where it asked for the formulae for what formed when sulfuric acid and another acid (think it was an organic acid?) was added to something (think it begun with a 'b' lol). if so what did you put?
wow so vague sorry
I think it was CH3CH2CH2NH3+HSO4-?
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Qwob
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#2196
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#2196
(Original post by LeaX)
can anyone remember the question where it asked for the formulae for what formed when sulfuric acid and another acid (think it was an organic acid?) was added to something (think it begun with a 'b' lol). if so what did you put?
wow so vague sorry
I think it was an amine with 4 carbons in it.

I put 2 amine molecules, each with an 'NH3 +' at the end, and then an 'SO4 2-'. Fairly sure that's incorrect though. I just guessed that the sulfuric acid would donate 2 hydrogens, 1 per amine. :confused:
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Qwob
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#2197
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#2197
(Original post by Blob2491)
I think it was CH3CH2CH2NH3+HSO4-?
That's probably the right answer.
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Bord3r
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#2198
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#2198
(Original post by Blob2491)
I think it was CH3CH2CH2NH3+HSO4-?
Yep and the other one was exactly the same but COO-
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luckypants
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#2199
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#2199
I put ch3ch2ch2nh4+so42-, is this wrong?
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Qwob
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#2200
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#2200
^ I can see at least three seemingly viable answers with that question. It was a bit odd.
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