Answer to Question #170697 in Chemistry for Hyeri

Question

Calculate the pH of a 0.1 F solution of NaHSO4.

Answer 1

NaHSO₄ dissociates as follows:

NaHSO₄ = Na⁺ + HSO₄^-

HSO₄- = H⁺ + SO₄^2-

Ka = [H⁺][SO₄^2-] / [NaHSO₄]

[H⁺][SO⁴_2-] = [NaHSO₄] × Ka = 0.1 F × 1.2 × 10-2 = 0.0012 F²

[H+] = 0.035 F

pH = -log[H+] = 2.92

Answer: 2.92