Calculate the pH for each of the following cases in the titr

Calculate the pH for each of the following cases in the titration of 50.0 mL of 0.110 M HClO(aq) with 0.110 M KOH(aq). The ionization constant for HClO can be found here. the ka value is 4.0*10^-8

the question is calculate the Ph a) before addition of any KOH

Solution

moles of HCLO = 0.05*0.110=5.5*10-3

x2/0.110-x = 4.0*10^-8