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Consider the titration of 100.0 mL of 0.100 M acetic acid with 0.100 M NaOH.

CH3CO2H(aq) + OH-(aq) →

CH3CO2-(aq) + H2O(l)

Ka for acetic acid = 1.8×10-5

Kb for acetate ion = 5.6×10-10

(a) What is the pH of the solution when 75.0 mL of 0.100 M NaOH has been added to 100.0 mL 0.100 M acetic acid?

(b) What is the pH at the equivalence point?

(c) What is the pH after 110.0 mL of NaOH has been added?

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