The Common Ion Effect predicts that the solubility of a salt in a solution alrea

Question

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 more, Le Chatelier's Principle predicts that the common ion will suppress precipitation more; the presence of the common ion will increase that concentration, hence K_sp will fall less; Le Chatelier's Principle predicts that the common ion will suppress dissolving less; the presence of the common ion will increase that concentration, hence K_sp will rise less, at equilibrium, Q will be less than Will a precipitate form when 10.0 mL of 0.500 M NaCI is added to 10.0 mL of 0.0500 M AgNO_3? The K_sp for AgCI is 1.8 times 10^-10 Yes, because Q K_sp No, because Q K_sp

Explanation / Answer

24. C,the common ion effect states that if the concentration of any one of the ions is increased, then, according to Le Chatelier's principle, some of the ions in excess should be removed from solution, by combining with the oppositely charged ions. Some of the salt will be precipitated until the ion product is equal to the solubility product. In short, the common ion effect is the suppression of the degree of dissociation of a weak electrolyte containing a common ion.

25. C

Ksp = [Ag+][Cl-]

Ksp = (0.500x0.01)(0.050x0.01) = 2.5x10-6> 1.8 X 10-10

since the ion product is > Ksp then YES a precipitate will form

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