Recall that the value of Kw for the autoionization of water varies with temperature. At the temperature of your body (37°C), Kw = 3.98 x 10-14 rather than 1.00 x 10-14. What is the pH of pure water at 37°C?

Question

Chemistry

Krystal Blackwell

11 November, 10:42

Recall that the value of Kw for the autoionization of water varies with temperature. At the temperature of your body (37°C), Kw = 3.98 x 10-14 rather than 1.00 x 10-14. What is the pH of pure water at 37°C?

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Answers (1)

Know the Answer?

Edgar Gibson · Answer 1

pH = 6.70

Explanation:

When Kw = 1x10^-14

[H3O+] = [OH-] - -> 1x10-7

Kw = 3.98x^10-14

3.98x^10-14 = [H3O+]. [OH-]

√ (3.98x^10-14) = [H3O+] = [OH-]

[H3O+] = 1.99*10^-7

- log [H3O+] = pH - --> - log 1.99x10^-7 = 6.70