Question

A solution at 25 C has a hydroxide ion concentration equal to 1.0 x 10-10 M. What is the [H+] of this solution?
A. 1.0 x 10-4 M
B. 1.0 x 104M
C. 1.0 x 101.4M
D. 1.0 x 10-24M

Answer 1

At 25C the kW is equal to 10^-14

Which is equal to the product of concentrations of [H}[OH]

Ss all you ned to do is this;

\[k_{w} = [H][OH^{-}] \]



\[\frac{ k_{w} }{ [OH^{-}] } = [H^{+}] \]

\[10^{-14} = [H^{+}][OH^{-}]\]