Calculate the k sp for zinc hydroxide if the solubility of zn (oh)2 in pure water is 2.1 x 10-4 g/l. calculate the k sp for zinc hydroxide i

Question

Calculate the k sp for zinc hydroxide if the solubility of zn (oh)2 in pure water is 2.1 x 10-4 g/l. calculate the k sp for zinc hydroxide if the solubility of zn (oh)2 in pure water is 2.1 x 10-4 g/l. 2.9 x 10-3 1.5 x 10-3 9.9 x 10-18 3.8 x 10-17

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2022-04-14T04:03:58+00:00 1 Answer 0

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  1. Ama12a
    0
    2022-04-14T04:04:59+00:00

    Zinc hydroxide is a uni-bi type of electrolyte.
    For such systems, k sp = 4S^3
    where S = solubility in mol/l

    Now for Zinc hydroxide, molecular weight = 99.4

    so, solubility = 2.1 x 10-4 g/l = 2.11 X 10^-6 mol/l
    Finally, k sp = 4S^3 = 4 X (2.11 X 10^-6)^3 = 3.77 X 10^-17

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