The K w for water at 0 ∘ C is 0.12 * 10 - 14. Calculate the pH of a neutral aqueous solution at 0 ∘ C.

Question

Chemistry

Ashley Marks

4 August, 23:35

The K w for water at 0 ∘ C is 0.12 * 10 - 14. Calculate the pH of a neutral aqueous solution at 0 ∘ C.

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Answers (1)

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Gabriella Clark · Answer 1

pH = 7.46

Explanation:

2H₂O ⇄ H₃O⁺. OH⁻ Kw = [H₃O⁺]. [OH⁻]

[H₃O⁺] = [OH⁻]

√0.12*10⁻¹⁴ = [H₃O⁺] → 3.46*10⁻⁸ M

- log [H₃O⁺] = pH

- log 3.46*10⁻⁸ = pH → 7.46