A 100.0 mL sample of 0.10 mol L^-1 NH₃ is titrated with 0.10 mol L^-¹ HNO₃. Determine the pH of the solution before the addition of any HNO₃. The K_b of NH₃ is 1.8 × 10^-5. A)4.74 B)9.26 C)11.13 D)13.00 E)12.55

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The pH of the solution before the addition of HNO₃ can be calculated using the Kb of NH₃. First, calculate the concentration of OH⁻ using the formula [OH⁻] = √(Kb × [NH₃]). Then, find the pOH and convert it to pH. The calculation gives a pH of approximately 11.13.

A 1000 ML Sample of 0