Question

What is produced when a weak acid is titrated by a strong base? How is this different from the titration of a strong acid with a strong base? How will this affect the pH at the equivalence point?

Answer 1

The titration of a weak acid with a strong base involves the direct transfer of protons from the weak acid to the hydoxide ion (coming from strong base).

suppose acetic acid with NaOH gives

CH3COOH + OH- -----> CH3COO- + H2O

If strong acid and strong base is reacted then net chemical reaction is between H+ and OH- ,leads to formation of H2O.

H+ + OH- ----> H2O

In case of weak acid is titrated by a strong base, the titration curve indicates end point before equivalence point, at equivalence point and after equivalence point.