What is the "pH" of "0.005M" solution of `Ba(OH)_(2)`

What is the pH of a 0.025 M solution of KOH ?

Calculate the pH of a 0.001 M solution of Ba(OH)_2 assuming it to be completely ionised .

What is the [OH^-] of a 0.65 M solution of NaOCl ?

Calculate the pH of a 10^(-3) M solution of Ba(OH)_(2) if it undergose complete ionisation (Kw=1xx10^(-10)) :-