What is the pH of a 0.2 M solution of NH₄Cl? K_b for NH₃ is 1.8 × 10^-5. A) 5.0 B) 11.3 C) 2.7 D) 7.0 E) 9.0

Name: What is the pH of a 0.2 M solution of NH 4 Cl? K b for NH 3 is 1.8 × 10 -5 . A) 5.0 B) 11.3 C) 2.7 D) 7.0 E) 9.0
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Quizplus · Accepted Answer

NH₄Cl is a salt of a weak base (NH₃) and a strong acid (HCl). It hydrolyzes in water to form NH₄⁺, which acts as a weak acid. Using the Kb of NH₃, we can find the Ka of NH₄⁺ and calculate the pH. The pH is approximately 5.0.

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