Calculate the pH of a 0.100 M aqueous solution of NH₃. The K_b of NH₃ is 1.77 × 10^-5. A)8.95 B)11.12 C)2.88 D)12.12 E)1.87

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Quizplus · Accepted Answer

To calculate the pH, first find the pOH using the formula: pOH = -log[OH⁻]. For NH₃, [OH⁻] can be calculated using the Kb expression: Kb = [NH₄⁺][OH⁻]/[NH₃]. Solving for [OH⁻] gives approximately 1.33 × 10⁻³ M. Then, pOH = -log(1.33 × 10⁻³) ≈ 2.88. Finally, pH = 14 - pOH = 11.12.

Calculate the PH of a 0