Answer to Question #307532 in General Chemistry for Ave

General Chemistry

Question #307532

What is the percentage water in alum [K(H2O)6Al(H2O)6(SO4)2]?

Expert's answer

The molecular weight of alum is 474.39

It contains 12 molecules of water or: 12 * 18.02 = 216.24

% H₂O = 216.24 / 474.39 = 0.4558 or 45.58%

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