Question

What is the concentration of a gas in an aqueous solution that is bottled with a partial pressure of 0.6 atm over the liquid at ${25}^{\circ }C$. The Henry's law constant for gas in water at ${25}^{\circ }C$ is $1.5\times {10}^{-2}atmmo{l}^{-1}L$

• A. $0.09M$
• B. $2.5\times {10}^{-3}M$
• C. $40M$
• D. None of the above

Answer 1

The correct option is C $40M$

By Henry's Law :
$\text{Pressure}\propto \text{Solubility}$
$P=K_{H}S$
$S$ is the solubility in $mol{L}^{-1}$
$K_H$ is Henry's law constant.
$P$ is the pressure in atm
$S=\frac{P}{K_H}=\frac{0.6}{1.5\times {10}^{-2}}S=40mol{L}^{-1}$