Equimolar solutions of the following were prepared in water separately. Which one of the solutions will record the highest pH ?

Step-by-step solution

Key Idea : As the basic nature increases, p H increases pH of base >7p H of acid < 7 In alkaline earth metals on moving downward the size of cation increases, thus basicity increases. Hence, the increasing order of basicity is as : MgCl ₂ < CaCl ₂ < SnCl ₂ < BaCl ₂ Therefore, the solution of BaCl ₂ will record the highest pH .