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Question

How many grams of carbon dioxide gas is dissolved in a 1 L bottle of carbonated water if the manufacturer uses a pressure of 2.4 atm in the bottling process at 25oC?
Given: KH of CO2 in water = 29.76 atm/(mol/L) at 25oC

A
3.88 g
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B
4.90 g
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C
5.33 g
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D
3.52 g
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Solution

The correct option is D 3.52 g
According to Henry's law, P=KHS
S is the solubility in moles per litre
KH is the henry's law constant
P is the pressure in atm.
Substitute values in the above expression.
2.4=29.76×S
S=0.0806M
Thus 0.0806 moles are present in 1 L of solution. This corresponds to 0.086×44=3.52g

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