Phenol (C6H5OH) has a pKa of 10. What is the pH of 0.1 M phenol solution? (Assume [H+] ≈ √(Ka × C))
Q1. Phenol (C6H5OH) has a pKa of 10. What is the pH of 0.1 M phenol solution? (Assume [H+] ≈ √(Ka × C))
Answer: 5.5
Explanation: Ka = 10^(-10). [H+] = √(10^(-10) × 0.1) = 10^(-5.5). pH = 5.5. Option A uses Ka = 10^(-10) directly.