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MCQ

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The Kb of NH₃ is 1.8 × 10⁻⁵ . What is the Ka of NH₄+ ?

Choose one · Correct answer highlighted

1.8 × 10⁻⁵ 1.0 × 10⁻¹⁴ 2.0 × 10⁻⁹ 5.56 × 10⁻¹⁰ Correct

Kw = Ka × Kb = 1.0 × 10⁻¹⁴ , Ka = (Kw/Kb) = (1.0 × 10⁻¹⁴/1.8 × 10⁻⁵) ≈ 5.56 × 10⁻¹⁰ .

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