Chemistry Homework

Question

At 25 °C, what is the hydroxide ion concentration, [OH–], in an aqueous solution with a hydrogen ion concentration of [H ] = 1.7 × 10–9 M?

 

[OH^-] = ? M

Answer 1

Use the relation

 

[H₃O⁺][OH^-] = 10^-14

 

[OH-] = 10^-14/[H₃O⁺] = 10^-14/(1.7 x 10^-9) ≅ 5.9 x 10^-6 M