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Questions and Answers
What do colligative properties mainly depend on?
What do colligative properties mainly depend on?
- The number of components or particles present in a solution (correct)
- The color of the solution
- The molecular weight of the solute
- The concentration of the solvent
Which property is pharmaceutically important as it leads to achieving isotonic solution dosage forms?
Which property is pharmaceutically important as it leads to achieving isotonic solution dosage forms?
- Vapor Pressure Lowering
- Freezing Point Depression
- Osmotic Pressure (correct)
- Boiling Point Elevation
Which equation is associated with Osmotic Pressure?
Which equation is associated with Osmotic Pressure?
- Henry's Law
- Raoult’s Law
- Van’t Hoff Equation (correct)
- Ideal Gas Law
What does the Boiling Point Elevation depend on in a solution?
What does the Boiling Point Elevation depend on in a solution?
What does Raoult’s Law describe in relation to colligative properties?
What does Raoult’s Law describe in relation to colligative properties?
Flashcards
Colligative Properties
Colligative Properties
Properties of a solution that depend solely on the number of solute particles present, not their identity.
Osmotic Pressure
Osmotic Pressure
The pressure required to prevent the inward flow of water across a semipermeable membrane.
Van't Hoff Equation
Van't Hoff Equation
A relationship between osmotic pressure, concentration, temperature, and gas constant.
Boiling Point Elevation
Boiling Point Elevation
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Raoult's Law
Raoult's Law
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Study Notes
Colligative Properties
- Colligative properties depend primarily on the number of solute particles in a solution, regardless of their identity.
- These properties include vapor pressure lowering, boiling point elevation, freezing point depression, and osmotic pressure.
Isotonic Solutions
- Osmotic pressure is a key colligative property that is pharmaceutically important for achieving isotonic solutions, essential for intravenous and injectable formulations.
- Isotonic solutions help prevent cell lysis or crenation due to osmotic imbalances.
Osmotic Pressure Equation
- The equation associated with osmotic pressure is π = iCRT, where:
- π represents osmotic pressure
- i is the van 't Hoff factor (number of particles the solute dissociates into)
- C is the molar concentration of the solute
- R is the ideal gas constant
- T is the absolute temperature in Kelvin
Boiling Point Elevation
- Boiling point elevation depends on the concentration of solute particles in a solvent; more solute increases the boiling point due to lowered vapor pressure.
- The relationship is described by the formula ΔT_b = iK_bm, where K_b is the ebullioscopic constant of the solvent and m is the molality of the solution.
Raoult's Law
- Raoult’s Law describes how the vapor pressure of a solvent decreases in a solution, proportional to the concentration of the solute.
- It states that the vapor pressure of the solvent in a solution (P_solution) is equal to the vapor pressure of the pure solvent (P°_solvent) multiplied by the mole fraction of the solvent in the solution.
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Description
Test your understanding of colligative properties in physical pharmacy with this quiz. Topics include vapor pressure, Raoult's law, and the lowering of vapor pressure in solutions. Perfect for students studying physical properties of substances.
