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Which of the following best describes the pH values at points A, B, and C on this titration curve?

titration curve for a weak acid with a strong base

A is the pH at the equivalence point;

B is the pH at the half-equivalence point;

C is the pH of the solution of the weak acid before adding NaOH and equals the pK_a of the weak acid

A is the pH at the half-equivalence point;

B is the pH at the equivalence point;

C is the pH of the solution of the weak acid before adding NaOH and equals the pK_a of the weak acid

A is the pH at the half-equivalence point and equals the pK_a of the weak acid;

B is the pH at the equivalence point;

C is the pH of the solution of the weak acid before adding NaOH

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A is the pH at the equivalence point and equals the pK_a of the weak acid;

B is the pH at the half-equivalence point;

C is the pH of the solution of the weak acid before adding NaOH

A is the pH at the equivalence point;

B is the pH at the half-equivalence point and equals the p

K_a of the weak acid;

C is the pH of the solution of the weak acid before adding NaOH

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