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Magnesium (Mg2+) makes water hard, which prevents soaps and detergents for working properly. Therefore, drinking water...

Magnesium (Mg2+) makes water hard, which prevents soaps and detergents for working

properly. Therefore, drinking water treatment plants use precipitation to reduce the

concentration of magnesium in the treated water. What pH is required to reduce a high

concentration of dissolved Mg2+ to 25 mg/L? The solubility product for the following reaction is 10−11.16: Mg(OH)2(s) = Mg2+(aq) + 2OH−(aq).

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