In a buffer solution made up of equal concentration of acetic acid (CH3COOH) and sodium acetate (CH3COONa), which component is used to buffer against added OH–? In other words, at the half-equivalence point of the titration of CH3COOH with NaOH, addition of a few milliliters of NaOH(aq), say, at 0.001 M concentration should have what consequence? A. H2O reacts with OH–

B. CH3COOH reacts with OH–

C. H+ reacts with OH–

D. Na+ reacts with OH–

E. CH3COO– reacts with OH–