Question: The Kb for NH3 is 1.8 10-5 at 25C. Calculate the pH of a buffer solution made by mixing 65.1 mL of 0.142 M

The Kb for NH3 is 1.8 × 10-5 at 25°C. Calculate the pH of a buffer solution made by mixing 65.1 mL of 0.142 M NH3 with 39.2 mL of 0.172 M NH4Cl at 25°C. Assume that the volumes of the solutions are additive.

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