
Concept explainers
Interpretation:
The approximate molarity of the given solution and the value of Henry’s law constant for the given gas are to be calculated.
Concept introduction:
According to Henry’s law, the temperature and solubility of dissolved gas are inversely related. When temperature increases, kinetic energy increases which causes the molecules to break the intermolecular bonds and escape from the solution. Hence solubility decreases.

Answer to Problem 7.44E
The approximate molarity is
Explanation of Solution
The mole fraction of
The mass of
Molar mass of
The number of moles of
The number of moles of
Substitute the values of mass and molar mass in the above formula.
The mass of
Molar mass of
The number of moles of
Substitute the values of mass and molar mass in the above formula.
The mass of
Molar mass of
Substitute the values of mass and molar mass of
The mass of the solution will be,
The volume of solution is calculated by the formula,
The density of water is
Substitute the value of mass and density in the above formula.
Convert
Therefore, the volume of solution is
The molarity of the aqueous solution is calculated by the formula,
Substitute the values of number of moles of
The expression for Henry’s Law is shown below.
Where,
•
•
•
The standard pressure in Pascal’s is
The value of mole fraction is
Substitute the value of pressure and value of mole fraction in the above expression.
Therefore, the Henry’s law constant is
The Henry’s law constant is
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Chapter 7 Solutions
EBK PHYSICAL CHEMISTRY
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