What is the pH value of pure water at 25°C?
- A. 5
- B. 7 ✓
- C. 9
- D. 14
Correct answer
B. 7
Explanation
Pure water at 25°C has a neutral pH of 7, meaning equal concentrations of H+ and OH− ions. Values below 7 are acidic; above 7 are basic.
B. 7
Pure water at 25°C has a neutral pH of 7, meaning equal concentrations of H+ and OH− ions. Values below 7 are acidic; above 7 are basic.