At a certain temperature, the solubility of barium chromate (#BaCrO_4#) is #1.8 x 10^-5# mol/L. What is the Ksp value at this temperature?
We write the solubility expression in this way:
Why do we square this value? We were quoted the solubility of barium chromate. Because the solubility represents the concentrations of chromate ion and barium ion.