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Henry's Law

Calculate the...

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 $3.1 \times 10^{- 2} a t m m o l^{- 1} L$

A

0.129 M

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B

129.03 M

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C

0.224 M

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D

224.3 M

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Solution

The correct option is D $224.3 M$
By Henry's Law :
$Pressure \propto Solubility$
$P = K_{H} S$
$S$ is the solubility in $m o l L^{- 1}$
$K_{H}$ is Henry's law constant.
$P$ is the pressure in atm
$S = \frac{P}{K_{H}} = \frac{4}{3.1 \times 10^{- 2}} S = 129.03 m o l L^{- 1}$

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