Acetate buffers plz help i don't understand this question?

Question

Describe the components of an acetate buffer.

show the reactions by which an acetate buffer resists changes in pH upon addition of H+/OH ion.

Answer 1

An acetate buffer consists of acetic acid and a salt of acetic acid, such as sodium acetate. The equilibrium reaction is:

HC2H3O2 <====> H+ + C2H3O2-

When a strong acid, H+, is added to the buffer solution, the equilibrium shifts to the left as the system tries to use up some of the added H+. The amount of C2H3O2- decreases and the amount of HC2H3O2 increases. The net result is that the H+ concentration is almost unchanged after addition of the strong acid, H+.

When a strong base, OH-, is added to the buffer solution, the equilibrium shifts to the right as the systems tries to replace some of the H+ removed by the OH-. The amount of C2H3O2- increases and the amount of HC2H3O2 decreases. But, the amount of H+ is almost unchanged by addition of the OH-.

The buffer resists a change in H+ (pH) until all the C2H3O2- or HC2H3O2 is used up. Then, chemists say that the buffer has been "blown".