What is the hydrogen ion concentration, [H+], in an aqueous solution that contains 3.91 × 10-2 M in hydroxide ion (at 25 °C).

Question

Enter your answer in exponential format using a capital "E"

Answer 1

[H⁺][OH^-] = Kw = 1x10^-14 (this is something you should memorize)

[H⁺][3.91x10^-2] = 1x10^-14

[H⁺] = 1x10^-14 / 3.91x10^-2

[H⁺] = 2.56x10^-13 M

In the form requested, [H⁺] = 3.91E^-13 M