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

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    (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?
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    They're all in the revision book. I think you have to just learn them off by heart...which is a bit crazy. I've chosen not to as I'm limited on time.
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    (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
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    Well, I've spent the last 18 hours revising on and off for this. I feel so tired. Need coffee!
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    (Original post by EstebanK0)
    Thanks How's the F334 revision going? Gonna sleep anytime soon lol?
    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
    Panicking aaaah! On my way to college now
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    (Original post by 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
    Panicking aaaah! On my way to college now
    Yeah, I'm having a cup of tea now. Feel like crap lol. Used the CGP as much as I could but didn't much do much in terms of past papers. Hopefully we'll all do good

    Good luck!
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    so, how did you guys find it?
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    (Original post by EstebanK0)
    so, how did you guys find it?
    it was a good paper! at least way better than Jan 13
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    (Original post by EstebanK0)
    so, how did you guys find it?
    Apart from the drawings and the second part of the isomer question, it was good. Defo better than January


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    (Original post by super121)
    Apart from the drawings and the second part of the isomer question, it was good. Defo better than January


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    Exactly what I had trouble with. What did you get for the rate constant value and units?
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    (Original post by super121)
    Apart from the drawings and the second part of the isomer question, it was good. Defo better than January


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    What did you get for the rate constant value and units for the last question?
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    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
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    Did we all get the amino acid was an acid in aq solution ?


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    (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?
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    (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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    (Original post by manpyy)
    i wasn't sure so i put neutral, why would it be acidic?
    I put down neutral too. Are we talking about the zwitterion question?
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    (Original post by EstebanK0)
    What did you get for the rate constant value and units for the last question?
    0.09 and s-1


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    (Original post by EstebanK0)
    I put down neutral too. Are we talking about the zwitterion question?
    yeah the zwitterion question
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    (Original post by manpyy)
    i wasn't sure so i put neutral, why would it be acidic?
    I guessed and put neutral too

    What did people get for the 6 mark calculation?


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    (Original post by super121)
    0.09 and s-1


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    I got the same unit but I got a value of 0.086

    Will I be penalised for giving an answer to 3 decimal places?
 
 
 
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