A solution at 25 degrees Celsius is 1.0 * 10-5 M H3O+. What is the concentration of OH - in this solution? 1.0 * 10-5 M OH - 1.0 * 10-14 M OH - 1.0 * 105 M OH - 1.0 * 10-9 M OH-

Question

Chemistry

Estrada

31 March, 23:22

A solution at 25 degrees Celsius is 1.0 * 10-5 M H3O+. What is the concentration of OH - in this solution? 1.0 * 10-5 M OH - 1.0 * 10-14 M OH - 1.0 * 105 M OH - 1.0 * 10-9 M OH-

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Answers (1)

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Zion Atkinson · Answer 1

1.0 x 10⁻⁹ M OH⁻.

Explanation:

∵ [H₃O⁺][OH⁻] = 10⁻¹⁴.

[H₃O⁺] = 1.0 x 10⁻⁵ M.

∴ [OH⁻] = 10⁻¹⁴/[H₃O⁺] = 10⁻¹⁴ / (1.0 x 10⁻⁵ M) = 1.0 x 10⁻⁹ M.

So, the right choice is: 1.0 x 10⁻⁹ M OH⁻.