Sulfurous acid is a diprotic acid with K_a1 = 1.40 × 10⁻² and K_a2 = 6.73 × 10⁻⁸.Which of the statements below are FALSE?
I K_b2 = 7.14 × 10⁻¹³
II K_b1 = 1.49 × 10⁻⁷
III For 0.1 M H₂SO₃,[H⁺] = 7.61 × 10⁻² for K_a1.
IV For 0.1 M NaHSO₃,pH $\approx$ 4.515.

Question

Sulfurous acid is a diprotic acid with K_a1 = 1.40 × 10⁻² and K_a2 = 6.73 × 10⁻⁸.Which of the statements below are FALSE?
I K_b2 = 7.14 × 10⁻¹³
II K_b1 = 1.49 × 10⁻⁷
III For 0.1 M H₂SO₃,[H⁺] = 7.61 × 10⁻² for K_a1.
IV For 0.1 M NaHSO₃,pH

\approx

4.515.

Quizplus · Accepted Answer

The calculations for Kb values and pH are incorrect for the given Ka values and concentrations.

Sulfurous Acid Is a Diprotic Acid with Ka1 = 1 ≈\approx≈

Sulfurous Acid Is a Diprotic Acid with K_a1 = 1 $\approx$