The solubility product for a salt of type AB is 7.1x10-6. ?

Question

The solubility product for a salt of type AB is 7.1x10-6. What is the A concentration of a saturated solution of AB prepared by mixing 75.7 mL of a solution containing 0.140 M A with 58.8 mL of a solution containing 0.180 M B?

Answer 1

Since Ksp = [A] [B], then saturated solutions will always have the concentration of √Ksp, no matter how they are prepared. [A] = 0.0027 M.