Chemistry

Problem

At 25 °C the solubility product constants of Mg(OH)₂ and Ba(OH)₂ are

1.8\times10^{-11}

and

5.0\times10^{-3}

, respectively. Calculate the ratio of their molar solubilities,

s_{\text{Ba}}/s_{\text{Mg}}

, in pure water at 25 °C. Report the ratio to two significant figures.