Calculate the hydrogen-ion concentration [H+] for the aqueous solution in which [OH-] is 1 x 10-4 mol/L. Is this solution acidic, basic, or neutral? Show your work.

[H⁺] = 1*10⁻¹⁰ → Basic solution

Explanation:

For this question we need to know, the autoionization of water:

2H₂O (l) ⇄ H₃O⁺ (aq) + OH⁻ (aq) Kw

Kw = 1ₓ10⁻¹⁴ → [H₃O⁺]. [OH⁻]

1ₓ10⁻¹⁴ / [OH⁻] = [H₃O⁺] → 1ₓ10⁻¹⁴ / 1*10⁻⁴ = 1*10⁻¹⁰

In order to determine if the solution is acidic, basic or neutral we use the pH value.

pH = - log [H₃O⁺] → - log 1ₓ10⁻¹⁰ = pH = 10 Basic solution

pH < 7 → Acidic solution

pH = 7 → Neutral solution

pH > 7 → Basic solution