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14 September, 03:09

Suppose 1.1854g of copper (II) sulfate pentahydrate is heated to drive off the water of crystallization. Calculate what mass of water would be expected to be released from the salt.

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  1. 14 September, 03:22
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    1) Copper (II) sulfate pentahydrate formula

    CuSO4.5H2O

    2) Molar mass, MM

    63.55g/mol + 32.07g/mol + 4*16g/mol + 5*18g/mol = 249.62 g/mol

    3) Proportion of water in the molecule of CuSO4.5H2O

    18.0 g H2O / 249.62 g CuSO4.5H2O

    4) Water in 1.1854 g of CuSO4.5H2O

    1.1854 gCuSO4.5H2O * [18.0 gH2O / 249.62 gCuSO4.5H2O] = 0.08548 gH2O

    Answer: 0.08548 g
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