Five saturated solutions of Mg3(PO4)2 are prepared. A test solution is added to each of the saturated solutions. Which test solution would increase the solubility of Mg3(PO4)2 in the saturated solution? a. MgBr2 b. Na3PO4 c. HClO4 d. (NH4)3PO4 e. Mg(NO3)2
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