Calculate the pH of a 0.20 M solution of the weak base pyridine. (C5H5N; Kb =...

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Calculate the pH of a 0.20 M solution of the weak base pyridine. (C₅H₅N; K_b = 1.7 x 10^-9). What is the pH of a 0.20 M solution of NH₄Cl? [K_b(NH₃) = 1.8 ´ 10^–5]

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