Multiple Choice
0.0201 g of aspirin is dissolved in enough water to produce a 100.0 mL solution. The osmotic pressure of this solution is 0.0271 atm at 301 K. Aspirin has a van't Hoff factor of 1. Determine the molar mass of aspirin.
6. Chemical Quantities & Aqueous Reactions
Osmolarity
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which of the following best describes osmolality?
A
The concentration of solute particles in a solution expressed as osmoles per liter of solution.
B
The ratio of solute to solvent in a solution.
C
The measure of the total volume of solute particles in a solution.
D
The concentration of solute particles in a solution expressed as osmoles per kilogram of solvent.
Verified step by step guidance1
Understand the concept of osmolality: Osmolality is a measure of the concentration of solute particles in a solution. It is expressed in terms of osmoles per kilogram of solvent, not per liter of solution.
Differentiate between osmolality and osmolarity: Osmolarity is similar to osmolality but is expressed as osmoles per liter of solution. Osmolality is more accurate for solutions where the solute concentration is high or the temperature varies.
Consider the units used in osmolality: The key unit for osmolality is osmoles per kilogram of solvent, which emphasizes the mass of the solvent rather than the volume of the solution.
Recognize the importance of osmolality in chemistry and biology: Osmolality is crucial for understanding how solutes affect the properties of solutions, such as boiling point elevation and freezing point depression.
Apply the concept of osmolality in practical scenarios: In medical and biological contexts, osmolality is used to assess the concentration of solutes in bodily fluids, which is important for maintaining proper cellular function and fluid balance.
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