Chemistry

Problem

At 25 °C, what is the hydroxide-ion concentration of a solution for which

[H_3O^+]=2.0\times10^{-5}\,\text{M}

? a)

1.0\times10^{-7}\,\text{M}

1.0\times10^{-9}\,\text{M}

5.0\times10^{-10}\,\text{M}

1.0\times10^{-14}\,\text{M}