A solution contains 0.1 M phenol and 0.5 M sodium hydroxide. What is the pH of the solution?
Q1. A solution contains 0.1 M phenol and 0.5 M sodium hydroxide. What is the pH of the solution?
Answer: 12
Explanation: Sodium hydroxide is a strong base, so it completely dissociates. The concentration of hydroxide ions is 0.5 M, which is a very strong base. The pH is calculated using the pOH formula: pOH = -log[OH-]. Since the solution is very basic, the pH would be close to 12.