Final answer:
To calculate the hydroxide ion concentration ([OH⁻]) for a solution at 25 degrees C with a given hydronium ion concentration ([H₃O⁺]), use the equation [OH⁻] = Kw / [H₃O⁺], where Kw is the ion product of water. In this case, the [OH⁻] is 4.26 x 10⁻¹² M.
Step-by-step explanation:
To calculate the hydroxide ion concentration ([OH⁻]) for a solution, we can use the equation Kw = [H₃O⁺] x [OH⁻], where Kw is the ion product of water. At 25 degrees C, Kw is equal to 1.0 x 10⁻¹⁴.
Given that the hydronium ion concentration ([H₃O⁺]) is 2.35 x 10⁻³ M, we can rearrange the equation to solve for [OH⁻].
[OH⁻] = Kw / [H₃O⁺]
[OH⁻] = (1.0 x 10⁻¹⁴) / (2.35 x 10⁻³) = 4.26 x 10⁻¹² M