Calculate the pH for the following case in the titration of

Calculate the pH for the following case in the titration of 50.0 mL of 0.140 M HClO(aq) with 0.140 M KOH(aq).HClO is a weak acid with a Ka of 4.0× 10–8. It reacts with strong base to produce ClO–.
(e) after addition of 60.0 mL of KOH

Solution

[OH-]=(60*0.14-50*0.14)/(60+50)

=0.0127

so pOH=1.896

so pH=14-1.896

=12.1