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

$\begin {array} {1 1} (1)\;CaCl_2 & \quad (2)\;SrCl_2 \\ (3)\;BaCl_2 & \quad (4)\;MgCl_2 \end {array}$

Can you answer this question?