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March 28, 2017

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Calculate the percent yield of alum if you obtained 75.0 g of potassium alum from 5.00 g Al.

  • Chemistry - ,

    Skeleton equation
    Al ==> KAl(SO4)2.12H2O
    mols Al = 5g/atomic mass Al
    mols KAl(SO4)2.12H2O moles Al.
    g KAl(SO4)2.12H2O = moles x molar mass. This is the theoretical yield.
    %yield = (75/theoretical yield)*100= ?

  • Chemistry - ,

    (75/87.7848)*100=85.4362%

  • Chemistry - ,

    Just use the formula from "DaDood FrumCheers" Theorem which is N=Pv(Pv2)/T.

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