The common ion effect predicts that the solubility of a salt in a solution already containing one of the ions in the salt will be ____ than the solubility in water. This is predictable, because ____. A) more; Le Chatelier's Principle predicts that the common ion will suppress precipitation B) more; the presence of the common ion will increase that concentration, hence K_sp will fall C) less; Le Chatelier's Principle predicts that the common ion will suppress dissolving D) less; the presence of the common ion will increase that concentration, hence K_sp will rise E) less; at equilibrium, Q will be less than K_sp

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The common ion effect predicts that the solubility of a salt in a solution already containing one of the ions in the salt will be less than the solubility in water. This is because Le Chatelier's Principle predicts that the common ion will suppress the dissolving of the salt in the solution, as the addition of the common ion disrupts the equilibrium and shifts the equilibrium towards the reactants. Therefore, a lower concentration of dissolved salt is in the solution.

The Common Ion Effect Predicts That the Solubility of a Salt