20ml of 0.2M $Al_2(SO_4)_3$ is mixed with 20ml of 0.6M $BaCl_2$.Calculate the concentration of each ion in solution.

Question

$\begin{array}{1 1}(a)\;0.2M\;Al^{+3},0.6M\;Cl^{-1}\\(b)\;0.1M\;Al^{+3},0.2M\;Cl^{-1}\\(c)\;0.3M\;Al^{+3},0.2M\;Cl^{-1}\\(d)\;0.2M\;Al^{+3},0.03M\;Cl^{-1}\end{array}$