Explain how a buffer solution controls pH
Equilibrium:
BH <--> H+ + B-
alkali reacts with H+, so equilibrium shifts to right to buffer change
acid reacts with B- to form BH, so equilibrium shifts to left to buffer change
GS
Equilibrium:
BH <--> H+ + B-
alkali reacts with H+, so equilibrium shifts to right to buffer change
acid reacts with B- to form BH, so equilibrium shifts to left to buffer change