# CHEM 112 Lecture Notes - Lecture 27: Silver Bromide, Ion, Sodium Chloride

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12 Apr 2016
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## Document Summary

Chem112 lecture 27 using ksp and concentration calculations. Agcl: all of these salts contain +1 cations and -1 anions, we can compare solubility"s based on ksp alone, as the ksp increases, the solubility increases as well. Using ksp in calculations and estimating solubility: how about calculating the solubility using ksp, the ksp for ca(oh)2 is 5. 9 x 10-5. Calucalute the solubility of ca(oh)2 in units of m and g/l: first, write the reaction, ca(oh)2 ca2+ + 2oh, then write the ksp equation, ksp = [ca2+][oh-]2. 2x: 5. 9 x 10-5 = x(2x)2 = 4x2, x = 2. 4 x 10-2 mol/l or m, 2. 4 x 10-2 x 24. 085 = 1. 8 g/l. Question: which lead salt has the greatest molar solubility in water, pbco3, pbs, pbso4, pbcro4, cannot compare these salts due to the different charges in ions. Ksp = 1. 8 x 10-13: the answer is c, remember that the largest ksp value indicates the most solubility.

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