GKFix MCQ Question

What is the correct expression for the pH of a solution of ammonium acetate?

• A. pH = 7 + ½(pKa + pKb)
• B. pH = 7 – ½(pKa + pKb)
• C. pH = 7 × ½(pKa – pKb)
• D. pH = 7 + ½(pKa – pKb)