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What is the pH of a 0.49 M solution of ammonium iodide (NH4I), given that ammonia...

What is the pH of a 0.49 M solution of ammonium iodide (NH4I), given that ammonia (NH3) is a weak base with Kb = 1.78 × 10-5?

A. 7.0

B. 9.2

C. 4.8

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