Question

a. what is the pH at the equivalenve point

b. what is the volume of added base at the equivalent point

c. at what volume of added base is the pH calculated by working an equilibrium problem based on the initial concentration and KA of the week acid

d. at what volume of added bass does the pH=pKa

e. at what volume of added base is the pH calculated by working an equilibrium problem based on the concentration and Kb of the conjugate base

Consider the following curve (Figure 1) for the titration of a weak monoprotic acid with a strong base and answer each of the following questions. Figure 1 of 1 > Hd o No 0 20 40 60 80 Volume of base added (mL)

Answer 1

a) pH at the equivalence point is around 9

b) The volume of added base at the equivalence point is around 30 mL

c) No idea

d) At half neutralization point pH = pKa i.e) at around 15 mL pH = pKa

Answer 2

c is 0 

at zero ml of added base you determine the ph just using the ka. if it was more than zero you would need to have longer calculations