Edexcel Chem 4 Jan 12 mark scheme typos?

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  1. Next Level's Avatar
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    Edexcel Chem 4 Jan 12 mark scheme typos?
    hey guys, for q.2 I got A and for q.9 I got B, however the mark scheme says the answer to q.2 is D and that for q.9 is A, have they made typos or am I missing something? thanks
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    Edexcel Chem 4 Jan 12 mark scheme typos?
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  4. majij's Avatar
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    Re: Edexcel Chem 4 Jan 12 mark scheme typos?
    (Original post by Next Level)
    hey guys, for q.2 I got A and for q.9 I got B, however the mark scheme says the answer to q.2 is D and that for q.9 is A, have they made typos or am I missing something? thanks
    For question 2 you have to divide the conc of 2HI by 2 to make it HI, you then get 0.0015, you have to take this number away from the initial conc of H2 and I2 0.010, which gives you their conc at equilibrium 0.0085. The answer is therefore D

    For question 9 you have to put priority on the heavies groups so therefore it must be CH3 and Br which shows that it is a Z isomer. The answer is therefore A
    Last edited by majij; 12-06-2012 at 15:59. Reason: corrections
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