Given: 12 sp K 1 10 x 2 Mg OH 0.01 M For a precipitate to form the ionic product solubility product K K At limiting pH consider that ip sp K K 2 2 sp 2 12 5 5 10 K Mg OH 10 0.01 OH OH 10 pOH log 10 pOH 5 So pH 14 5 Limiting pH 9
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