Calculate the pH of the following aqueous solutions. Choose your answer from the given pH ranges. -0.5 M NH₄F (pK_b for NH₃ = 4.74, pK_a for HF = 3.14) A) pH 11.00-14.00 B)PH 0.00-2.99 C)PH 3.00-5.99 D)PH 6.00-8.99 E)PH 9.00-10.99

Question

Quizplus · Accepted Answer

NH4F is a salt of a weak acid (HF) and a weak base (NH3). The pH of the solution depends on the relative strengths of the acid and base. Since pKa for HF (3.14) is lower than pKb for NH3 (4.74), the solution is slightly acidic, placing the pH in the range of 6.00-8.99.

Calculate the PH of the Following Aqueous Solutions