Calculate the molarity of caffeine in a 12 oz cola drink containing 58.9 mg of caffeine, C8H10N4O2.?

(1oz = 29.6 mL)

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  • 1 decade ago
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    First calculate the amount of caffeine (in mol):

    58.9 x 10^-3 g Caffeine / 194.19 g/mol caffeine =

    3.033 x 10^-4 mol caffeine

    This is in 12 oz, need to convert to L.

    12oz * 29.6mL/oz *(0.001L/mL) = 0.3552L

    Concentration = mol/vol

    Conc = 3.033 x 10^-4 / 0.3552L

    Conc = 8.54 x 10^-4 M

    The caffeine concentration is 8.54 x 10^-4 M

    Hope this helps

    Oz

    Source(s): PhD Chemist
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