
Concept explainers
(a)
Interpretation: The molality for
Concept introduction
Molality: Molality is defined as number of moles of the solute present in the specified amount of the solvent in kilograms.
Moles: One mole is equivalent to the mass of the substance consists same number of units equal to the atoms present in
From given mass of substance moles could be calculated by using the following formula,
Mass: It is the quantitative measure of a substance. The amount of matter present in substance is expressed as mass. The
(a)

Answer to Problem 13.16QP
Molality of
Explanation of Solution
Given data: Strength of
Density of
Calculate mass of water:
The mass of solvent (water) determined by calculating the mass of solution then subtracting the solute mass with solution mass.
Calculate molality of the solution:
By plugging the value of
(b)
Interpretation: The molality for
Concept introduction
Molality (m): Molality is the number of moles of solute present in one kilogram of solvent. Molality is estimation of moles in relationship with solvent in the solution.
Percent by mass: It is the ratio of solute mass to the solution mass which finally multiplied by
Moles: One mole is equivalent to the mass of the substance consists same number of units equal to the atoms present in
From given mass of substance moles could be calculated by using the following formula,
Mass: It is the quantitative measure of a substance. The amount of matter present in substance is expressed as mass. The
(b)

Answer to Problem 13.16QP
Molality of
Explanation of Solution
Given data: Mass percent for
From mass percent it is clear that
Calculate moles of
Molecular mass of
By plugging the value of mass percent of the solution and molecular mass of solute, the moles of
Calculate mass of water:
Calculate molality of the solution:
By plugging the value of
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Chapter 13 Solutions
EBK GENERAL CHEMISTRY: THE ESSENTIAL CO
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