Question

how can we know p^H of a buffer solution ?

Answer 1

Predicting the pH of a Buffer. The pH of a buffer is determined by two factors; 1) The equilibrium constant Ka of the weak acid and 2) the ratio of weak base [A-] to weak acid [HA] insolution. ... If a buffer has more acid than base, more H+ ions are present and the pH will fall

Answer 2

Predicting the pH of a Buffer. The pH of a buffer is determined by two factors; 1) The equilibrium constant Ka of the weak acid and 2) the ratio of weak base [A-] to weak acid [HA] in solution. ... If a buffer has more acid than base, more H+ ions are present and the pH will fall.