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    (Original post by Daniel Atieh)
    ANY ONEEE PLZ i need help in jan 2013 q 1 aiv ---why the color is not blue-black ..
    When you dissolve kI+cl2-->I2+kcl
    the colour of the solution is brown because iodine is formed, which is brown in solution. It only changes to blue-black if starch is added.
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    (Original post by KhawlaM)
    When you dissolve kI+cl2-->I2+kcl
    the colour of the solution is brown because iodine is formed, which is brown in solution. It only changes to blue-black if starch is added.
    oh yea thx a lot ...also explain to me q4aii
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    The first MCQ for today's BIOLOGY paper. Was the first answer C?
    Sorry for posting it here but the other thread is closed.


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    yes
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    (Original post by ramanan)
    yes
    ok for the economic issue i wrote paragraph 9...wbu?
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    (Original post by Daniel Atieh)
    oh yea thx a lot ...also explain to me q4aii
    I didn't understand the answer, but the answer should be:
    the reaction is too slow, less HBr is formed and therefore low yield.
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    (Original post by KhawlaM)
    I didn't understand the answer, but the answer should be:
    the reaction is too slow, less HBr is formed and therefore low yield.
    yes but why less HBr...will water react with anything or what? am not getting it rlly
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    (Original post by Gunner121)
    Thank you so much to all of you :
    leafy9
    Relaxedexams
    Sweet Strawberry (funny name you got )
    Lol gunner121 the username field kept rejecting all the names I put in and I was eating strawberries at the time so I thought why not?! ;D


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    Any predictions for which Experiments are most likely to come????
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    best of luck everyone. hope everyone will do well, including me.
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    (Original post by Munchee)
    Any predictions for which Experiments are most likely to come????
    Test for ions and organic chemistry. Those two for sure

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    the difference between fractional distillation diagram and the distillation diagram is the fractionating cloumn. So you just have to draw circles to fill up the fractionating column.
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    good luck everyone
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    118138031-Edexcel-Chemistry-Unit3B-Notes.pdf

    Might help
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    (Original post by Relaxedexams)
    Test for ions and organic chemistry. Those two for sure

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    THANKS!!
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    What's the preparation of a double salt?
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    (Original post by *mariya*)
    what's the preparation of a double salt?
    i don't even know what's a double salt!!!!
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    (Original post by Sweet Strawberry)
    Lol gunner121 the username field kept rejecting all the names I put in and I was eating strawberries at the time so I thought why not?! ;D


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    lol , hope you stay sweet for the whole month!
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    So, before I go off to do my next unit 3 (physics) I'll just ask: How did everyone do?




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    (Original post by Gunner121)
    lol , hope you stay sweet for the whole month!
    Hey of course I'll stay sweet forever!


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