# Problem: In which of the following aqueous solutions would you expect AgCl to have the lowest solubility? Choose one answer. a. 0.020 M KCl b. pure water c. 0.015 M NaCl d. 0.020 M BaCl2 e. 0.020 M AgNO3

###### FREE Expert Solution

We’re being asked to determine in which solvent AgCl would be least soluble in.

The common ion effect states that the solubility of a salt is lower in the presence of a common ion. This means if there is a higher concentration of a common ion present, the less soluble a compound will be. The dissociation of AgCl in water is as follows:

The chloride ion, Cl, has a charge of –1. Silver then has a charge of +1:

AgCl(s)  Ag+(aq) + Cl(aq)

Among the given choices, pure water and 0.020 M AgNO3 don't contain common ions so the solubility of AgCl is not lowered in those.

We’ll now determine which between the remaining solutions have higher Cl concentration: a higher Cl (common ion) concentration will lead to lower solubility of AgCl.

96% (258 ratings) ###### Problem Details

In which of the following aqueous solutions would you expect AgCl to have the lowest solubility? Choose one answer.

a. 0.020 M KCl

b. pure water

c. 0.015 M NaCl

d. 0.020 M BaCl2

e. 0.020 M AgNO3