Chemistry

Problem

For three clear, colorless solutions at 25 °C the reported hydronium ion concentrations are: 1.

1.0\times10^{-4}\,\text{M}

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

2.5\times10^{-2}\,\text{M}

Arrange the solutions in order of decreasing basicity (most basic to least basic).