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(a)
Interpretation:
The molality of potassium iodide in the aqueous solution has to be calculated.
Concept Introduction:
Raoult’s law:
It states that the equilibrium vapor pressure of the solvent over a solution is directly proportional to the mole fraction of the solvent in the solution.
The expression for the vapor pressure lowering is given below.
Where,
(a)
Answer to Problem 16.30P
The molality of
Explanation of Solution
Given that, the vapor pressure lowering of an aqueous solution of potassium iodide is
The vapor pressure of pure water at
Then,
Suppose the molality of aqueous solution of
The number of moles of
The mole fraction of
Now, molality of aqueous solution of
Therefore, the molality of
(b)
Interpretation:
The molality of strontium chloride in the aqueous solution has to be calculated.
Concept Introduction:
Raoult’s law:
It states that the equilibrium vapor pressure of the solvent over a solution is directly proportional to the mole fraction of the solvent in the solution.
The expression for the vapor pressure lowering is given below.
Where,
(b)
Answer to Problem 16.30P
The molality of
Explanation of Solution
Given that, the vapor pressure lowering of an aqueous solution of
The vapor pressure of pure water at
Then,
Suppose the molality of aqueous solution of
The number of moles of
The mole fraction of
Now, molality of aqueous solution of
Therefore, the molality of
(c)
Interpretation:
The molality of ammonium sulfate in the aqueous solution has to be calculated.
Concept Introduction:
Raoult’s law:
It states that the equilibrium vapor pressure of the solvent over a solution is directly proportional to the mole fraction of the solvent in the solution.
The expression for the vapor pressure lowering is given below.
Where,
(c)
Answer to Problem 16.30P
The molality of
Explanation of Solution
Given that, the vapor pressure lowering of an aqueous solution of
The vapor pressure of pure water at
Then,
Suppose the molality of aqueous solution of
The number of moles of
The mole fraction of
Now, molality of aqueous solution of
Therefore, the molality of
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Chapter 16 Solutions
General Chemistry
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