The solubility of compound A in water is 3 g /100ml at 25oC, 11 g/100 ml at 60 oC . If you were to dissolve 20 g of A in 200 ml of water at

Question

The solubility of compound A in water is 3 g /100ml at 25oC, 11 g/100 ml at 60 oC . If you were to dissolve 20 g of A in 200 ml of water at 60 oC and then slowly cool down the solution to induce crystallization, how many grams of compound A would come out of solution at 25oC?

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Diễm Kiều 7 months 2021-07-15T23:16:40+00:00 1 Answers 2 views 0

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    2021-07-15T23:18:38+00:00

    Answer:

    14g of A would come out

    Explanation:

    The solubility of A at 60°C is 11g/100mL. In 200mL, solubility is:

    22g/200mL. That means, the 20g of A will be dissolved completely at 60°C.

    Then, at 25°C, the solubility of A is 6g/200g. That means the amount of A that precipitates during the temperature decreasing is:

    20g-6g =

    14g of A would come out

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