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Problem- What is the solubility product of Mg(OH)2 in 0.05M NaCl if the activity coefficients for the ions in solution are as follows: Na = 0.82, Cl = 0.81, Mg =0.52 and OH = 0.81. The Ksp for Mg(OH)2 in pure water is 7.1 x 10^-12

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