Question

Placing a slightly soluble ionic solid in a solution containing common ions will Select the correct answer below:

increase the molar solubility of the solid relative to its molar solubility in pure water.

decrease the molar solubility of the solid relative to its molar solubility in pure water.

have no effect on the molar solubility of the solid.

depends on the solid

Answer 1

decrease the molar solubility of the solid relative to its molar solubility in pure water.

Step-by-step explanation:

The common ion effect is defined as a decrease in the solubility of a solute because of the addition of a second solute with which it has a common ion. If a solution already contains a solute MX and another ionic solid containing BX is added to the solution, the X^- anion is common to the both species. Hence the presence of MX will decrease the solubility of BX compared to the solubility of BX in pure water.

Generally, when a soluble ionic solid is placed in a solution containing a common ion, the molar solubility of the solid decreases compared to its molar solubility in pure water.