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27 March, 20:31

sample of copper (II) sulfate pentahydrate, CuSO4⋅5H20, is heated to remove the water of hydration from the crystals. The mass of the original sample before heating was 50.00 grams. If the mass of the cool, dry sample after heating is 34.95 grams, find the experimental percentage of water in the hydrate.

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  1. 27 March, 21:29
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    30.10%

    Explanation:

    The mass of water is:

    50.00 g - 34.95 g = 15.05 g

    So the percentage of water is:

    15.05 g / 50.00 g * 100% = 30.10%
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