What is the [OH^+] ina solution that has a pH=4.02

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Chemistry

Everett Barron

5 November, 00:31

What is the [OH^+] ina solution that has a pH=4.02

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Ainsley Duffy · Answer 1

Answer is: concentration of hydroxide ions [OH⁻] is 1.047·10⁻¹⁰ M.

pH = 4.02.

pH = - log[H⁺ ].

[H⁺] = 10∧ (-pH).

[H⁺] = 10∧ (-4.02).

[H⁺] = 9.54·10⁻⁵ M; equilibrium concentration of hydrogen cations.

[H⁺] · [OH⁻] = 1·10⁻¹⁴ M².

[OH⁻] = 1·10⁻¹⁴ M² : 9.54·10⁻⁵ M.

[OH⁻] = 1.047·10⁻¹⁰ M; equilibriom concentration of hydroxide anions.