Calculate the pH of a buffer prepared by mixing 300 cc of 0,3 M NH3 and 500 cc of 0,5 M NH4CI. Kb for NH3 = 1,8 × 10^-5

NH3 = 0,3 M

V NH3 = 300 cc

NH4Cl = 0,5 M

V NH4Cl = 500 cc