Practice question
Question
The Ka of HNO₂ is 4.5 × 10⁻⁴ . What is the Kb of NO₂- at 298 K?
Explanation
Kw = Ka × Kb = 1.0 × 10⁻¹⁴ , Kb = (1.0 × 10⁻¹⁴/4.5 × 10⁻⁴) ≈ 2.22 × 10⁻¹¹ .
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