chemistry

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what is the formula for the sodium sulfate if 3.54g of dry solid remain after 8.50g of hydrate are heated??

  • chemistry -

    hydrate ==> anhydrous + H2O
    ..8.50g......3.54.......4.96

    mols Na2SO4 = 3.54/142 = about 0.0249
    mols H2O = 4.96/18 = about 0.275
    0.0249/0.0249 = 1.000
    0.275/0.0249 = 11.0
    empirical formula is Na2SO4.11H2O based on these data.

  • chemistry -

    thank you, very helpful

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