pH of acid or base mixtures
Exercise 3
Determine the $pH$ of the solution obtained by mixing $V_1=$ 200 $mL \; HCl $ 0.05 $M$ with $V_2=$ 400 $mL \;$ A$lCl_3 $ 0.7 $M$
$HCl$ strong acid , $Αl(H_2O)_6^{3+}$ : weak acid
$n_{HCl}$ $=$ $c_{HCl}\cdot V_{HCl}$ = 0.01 mol
$pH$ $=$ $14$ $+$ $log\frac{n_{HCl}}{V_1+V_2}$ = 1.778