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Thread: need chemistry help please

  1. #1
    love is offline Active Member
    Join Date
    Aug 2006
    Location
    warwickshire
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    14

    need chemistry help please

    ok im totally dumb when it comes to chemistry and completly have no understanding of it, any ways i have this assignment to complete and the question is :

    In an experiment to determine the solubility of aspirin in ethanol it was found that 7.14g of aspirin could be dissolved in 50ml of ethanol at 20°C
    (c) use the data to calculate the solubility of aspirin in ethanol in SI units and also its concentration in mmol per litre

    please help

  2. #2
    johnep is offline Moderator
    Join Date
    Nov 2006
    Posts
    5,997

    Re: need chemistry help please

    This means that 14.28 grms would dissolve in 100mls solvent. mmols are molecular weight in grms/litre so just multiply by 10 and then calculate MW of aspirin and do by simple proportion.
    johnep

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