Does common ion effect increase solubility?
Common ion effect: This effect persists when any salt is added to a solution containing either the same cation or anion which leads to a change in solubility.
For example, when gaseous hydrogen chloride () is passed through a sodium chloride () solution, leading to the precipitation of due to the excess of chloride () ions in the solution. Hence, we can conclude that the common ion effect will decrease the solubility.