Interpretation:
Molality of
Concept introduction:
The concentrations of solutions are expressed in different ways, all of them involved in the quantity of solute and the quantity of solution or solvent. Among them, molality is most appropriate unit to express the concentration of solution.Molality: Molality is defined as the number of moles of solute per kilogram of solvent. Molality is denoted by ‘m’. The volume of a solution changes with temperature, this change in volume alters the molarity of the solution. Masses, however, do not change with temperature. Molality does not change with change of temperature.
In expression
Again,
Answer to Problem 27PP
Molality of
Given information:
Mass of
Mass of solvent = 1000 gm = 1 kg
Molecular weight of Na2SO4 = 142.04 gm/mol
Explanation:
Write the expression of molarity of solution,
This can be written as
Substituting the values in the above equation:
Write the expression for the molarity of solution:
Thus, Molality of
Explanation of Solution
Given information:
Mass of
Mass of solvent = 1000 gm = 1 kg
Molecular weight of Na2SO4 = 142.04 gm/mol
Write the expression of molarity of solution,
This can be written as
Substituting the values in the above equation:
Write the expression for the molarity of solution:
Thus, Molality of
Chapter 14 Solutions
Chemistry: Matter and Change
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