Question

Calculate the concentration of $C{O}_2$ in a soft drink that is bottled with a partial pressure of 4 atm over the liquid at ${25}^{\circ }C$. The Henry's law constant for $C{O}_2$ in water at ${25}^{\circ }C$ is $3.1\times {10}^{-2}atmmo{l}^{-1}L$

• A. $0.129M$
• B. $129.03M$
• C. $0.224M$
• D. $224.3M$

Answer 1

The correct option is D $224.3M$

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
$S=\frac{P}{K_H}=\frac{4}{3.1\times {10}^{-2}}S=129.03mol{L}^{-1}$