The pH of pure water at 25°C is 7. This is because:

Question

Team JKExamLibrary · Accepted Answer

Water self-ionizes: H₂O ⇌ H⁺ + OH⁻. At 25°C, [H⁺] = [OH⁻] = 10⁻⁷ mol/L, so Kw = 10⁻¹⁴ and pH = pOH = 7. A solution is neutral when [H⁺] = [OH⁻]. pH 7 is neutral only at 25°C; at higher temperatures, Kw increases, pH of neutrality drops but still [H⁺]=[OH⁻].

The pH of pure water at 25°C is 7. This is because: MCQ with Answer and Explanation

Solution (By JKExamLibrary)

Discuss this Question (0)

Practice More chemistry Questions