Question

1) Give an example of a buffer solution?
2) Explain how the buffer solution named in 1) resists changes in pH when an acid or alkali is added to it.

Answer 1

Acetic Acid(HOAc) + Sodium Acetate(NaOAc) => common ion solution that inhibits changes in pH with addition of quantities of H^+ or OH^-. If H^+ is added to the buffer solution, the excess reacts with the OAc^- ion to form HOAc and consumes the excess H^+. If OH^- is added, the OH^- ions combine with H^+ forming water and consumes the excess OH^-.