A buffer solution contains 0.1 M of acetic acid and 0.1 M of sodium acetate.

A buffer solution contains 0.1 M of acetic acid and 0.1 M of sodium acetate.What will be its pH? (pKa of acetic acid is 4.75)

(a) 5
(b) 4
(c) 5.25
(d) 4.75

4.75

Applying the equation:
pH = log {[Salt]/[Acid]} + pKₐ
⇒ here, pH = pKₐ + log 1, pH = 4.75.

admin: