Question

An aqueous solution at 25°C has an OH- concentration of 2.4 x 10^-12 M. Calculate the H3O+ concentration. Be sure your answer has the correct number of significant digits. (Open-ended)

Answer 1

To calculate the H3O+ concentration given the OH- concentration, we use the ion product of water equation.

Step-by-step explanation:

To calculate the H3O+ concentration given the OH- concentration in an aqueous solution at 25°C, we can use the relationship between these two ions in water.

The concentration of H3O+ can be determined using the ion product of water (Kw) equation: Kw = [H3O+][OH-]. At 25°C, Kw is equal to 1.0 x 10^-14.

Therefore, we can rearrange the equation to solve for [H3O+]: [H3O+] = Kw / [OH-]. Substituting the given OH- concentration of 2.4 x 10^-12 M into the equation, we get:

[H3O+] = (1.0 x 10^-14) / (2.4 x 10^-12) = 4.17 x 10^-3 M.