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

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Don't give up hope till results- and look ahead to tomorrow. Easier said than done, especially when I know I've ballsed up a subject

Reply 221

nukethemaly

Original post by Tomatochuckers

Biology unit 5 grade boundaries don't shift much I don't think.

Also, there were less data response questions which although time consuming are generally considered to be pretty easy marks, no easy 5 marker core practical question either.

Yeah that paper was very knowledge based and applied stuff, I thought. I was just glad that nothing was tooo hard on the synoptic article!

Reply 222

nukethemaly

losing hope by the minute. you?

Reply 223

Tomatochuckers

Going over some of the CGP book and just strengthening some areas, whilst looking at past papers. Better late than never I suppose :colondollar:

Also I'm going to be the only one in my school doing this paper. I'm a resit candidate and everyone else will be doing OCR A

Reply 224

Tomatochuckers

Yeah they conveniently decided that we were the last year who had to endure the wrath of salters

Reply 225

Another

Abstract question here, How are we meant to know the colours of Ligand complexes? Is there a way to work them out? I've seen a few crop up like [Fe(OH)6] in the exam papers, and I've never even seen them in the texbook.

Reply 226

vsmahal

Original post by Another

Look in Page 33 of the salters a2 revision guide.

Fe2+ + 2OH- ======> Fe(OH)2 green gelatinous solid
Fe3+ + 3OH- ======> Fe(OH)2 orange gelatinous solid
Cu2+ + 2OH- ======> Fe(OH)2 pale blue solid

Reply 227

Another

Original post by vsmahal

Look in Page 33 of the salters a2 revision guide.

Fe2+ + 2OH- ======> Fe(OH)2 green gelatinous solid
Fe3+ + 3OH- ======> Fe(OH)2 orange gelatinous solid
Cu2+ + 2OH- ======> Fe(OH)2 pale blue solid

But those are precipitates, not the ligand complexes. (Plus I don't have a revision guide!)

I meant how do you work out that [Fe(H2O)6] is yellow, and that [Cu(H2O)6] is blue?

Reply 228

vsmahal

Original post by Another

But those are precipitates, not the ligand complexes. (Plus I don't have a revision guide!)

I meant how do you work out that [Fe(H2O)6] is yellow, and that [Cu(H2O)6] is blue?

Sorry, misread the question. Look at page 262 in chemical ideas as it has a table of all the transition metal colors

Reply 229

RainieXD

Lol sorry switched off the laptop haha ^^"
Yeah I went to sleep at 4.30-5.00 ish and still don't feel like I revised enough :frown:

Panicking aaaah! On my way to college now :frown:

Reply 230

11hokj1

it was a good paper! at least way better than Jan 13 :smile:

Reply 231

super121

Apart from the drawings and the second part of the isomer question, it was good. Defo better than January :smile:

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Reply 232

manpyy

with the isomer questions was there a double bond in the question? because im pretty sure there wasn't and was having difficulty with that question but others said there was a double bond so im really confused :s-smilie:

Reply 233

Futuristicmedic

Did we all get the amino acid was an acid in aq solution ?

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Reply 234

manpyy

Original post by Futuristicmedic

Did we all get the amino acid was an acid in aq solution ?

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i wasn't sure so i put neutral, why would it be acidic?

Reply 235

Futuristicmedic

Original post by manpyy

i wasn't sure so i put neutral, why would it be acidic?

I just thought that in solution H+ will be donated from the -COOH and not all the nh2 will be pronated , so some will still be in solution

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