Gravimetric Analysis
A 1.000 g sample of an aluminum is dissolved and the sulfate precipitated as BaSO4. The precipitate weighed 0.3486 g after it was washed and ignited. Assuming all the sulfate and aluminum in the sample were in the form of K2Al2(SO4)3 • 24 H2O,
Calculate the percentage of Al2O3 in the sample.
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