the initial ph is that of the strong base solution to be titrated. calculate the ph by working an equilibrium problem using the concentration of the strong base as the initial concentration. the initial ph is that of the strong base solution use for titration. calculate the ph by working an equilibrium problem using the concentration of the weak acid as the initial concentration. the initial ph is that of the weak acid solution to be titrated. calculate the ph by working an equilibrium problem using the concentration of the strong base as the initial concentration. the initial ph is that of the weak acid solution to be titrated. calculate the ph by working an equilibrium problem using the concentration of the weak acid as the initial concentration.