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Edexcel A2 Chemistry Exams -6CH04 (14th June) and 6CH05 (22nd June) Discussion Thread Watch

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    An alkaline fuel cell does have a platinum electrode right? for the MCQ it was KOH for the electrolyte and platinum electrode?
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    (Original post by oShahpo)
    I did the same but I shouldn't lose any marks as the reaction will most definitely proceed anyway. I said put excess ammonia to neutralise the acid too, just in case.
    its out of 6, so i hope we only lose 2 marks :'(
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    (Original post by payet27)
    Bro please help post the unofficial mark scheme, would be great!, thanks.
    Loool it's all a blur I can't remember the questions xD I reckon samb1234 and C0balt might be better for this haha
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    (Original post by razortoad)
    Pretty sure it was B because the monomer is formed from the C=C and not the nitrogen. This, again, has come up before exactly the way it was. They seem to like recycling questions a lot xD
    for that one i did this , Name:  IMG_20160622_121101.jpg
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    What was the answer to the mcq where it asks for the best explanation for why amino acids are solid?
    I said the zwitterion one, but I have a bad feeling that the answer was that they're amphoteric.


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    I got 95.1% and I put B for the MC question about the really long amino acid chain question
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    (Original post by GrandMasti)
    An alkaline fuel cell does have a platinum electrode right? for the MCQ it was KOH for the electrolyte and platinum electrode?
    Yeap
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    (Original post by GrandMasti)
    An alkaline fuel cell does have a platinum electrode right? for the MCQ it was KOH for the electrolyte and platinum electrode?
    think it was graphite elctrode and oh electrolyte
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    GrandMasti Fe3+ for catalyst?
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    (Original post by DesignPredator)
    I wrote reverse but I still think dpp only will suffice because Cu reacts with Cu2+ to form Cu+, the same ELEMENT is being oxidised and reduced.
    It needs to be the same species. Element doesn't matter


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    (Original post by Don Pedro K.)
    GrandMasti Fe3+ for catalyst?
    Yep
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    What was the salt bridge for the hydrogen electrode? NaCl?
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    (Original post by oShahpo)
    What was the salt bridge for the hydrogen electrode? NaCl?
    I said potassium nitrate

    But NaCl should be fine I think
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    (Original post by Don Pedro K.)
    Loool it's all a blur I can't remember the questions xD I reckon samb1234 and C0balt might be better for this haha
    I haven't got the time soz
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    (Original post by GrandMasti)
    An alkaline fuel cell does have a platinum electrode right? for the MCQ it was KOH for the electrolyte and platinum electrode?
    I put that as well, but I just looked it up and it's a porous carbon electrode. :/


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    was paracetamol 95 %??????
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    For some of the ionic equations, was it okay to write it in terms of displayed structure (like the one with the amino acid)m

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    (Original post by C0balt)
    I haven't got the time soz
    cobalt , did you put graphite electrode for the mcq
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    Pleaseeee i beg someone actually post the unofficial mark scheme first then lets discuss!!!!!!!!!!!!!!
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    Which one was the polypropenamide monomer?
 
 
 
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