80. Solving a chemistry problem

2) Select a titrant for the compound specified in your version, calculate and plot the titration curve. Calculate [H+] and pH for points 0; fifty; 90; 99.9; 100; 100.1%. Specify the limits of the titration jump and the pH of the medium at the equivalence point. Justify the choice of indicator. Calculate the indicator error.
Salt - С6H5ONa
To dissociation = 4.0 * 10-10
Concentration = 0.06000 Sn