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Equimolar solutions in the same solvent have
- a)same boiling and freezing point
- b)different boiling and freezing point
- c)same freezing point but different boiling point
- d)same boiling point, but different freezing point
Correct answer is option 'A'. Can you explain this answer?
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Most Upvoted Answer
Equimolar solutions in the same solvent havea)same boiling and freezin...
Boiling point and freezing point depend on Kb (molal elevation constant) and Kf(molal depression constant) of the solvent. Thus equimolar solution (of the non-electrolyte) will have same boiling point and also same freezing point.
ΔTf=Kf × molality
ΔTb=Kb × molality
Note: In question nature of solute has not been mentioned. Hence, we have assumed that solute is non-electrolyte.
ΔTf=Kf × molality
ΔTb=Kb × molality
Note: In question nature of solute has not been mentioned. Hence, we have assumed that solute is non-electrolyte.
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Equimolar solutions in the same solvent havea)same boiling and freezin...
Equimolar solutions in the same solvent have the same boiling and freezing point.
Therefore, equimolar solutions in the same solvent have the same boiling and freezing point because both boiling point elevation and freezing point depression are colligative properties that depend on the number of solute particles and not their identity.
Boiling Point of Equimolar Solutions
- Boiling point is the temperature at which the vapor pressure of a liquid equals the atmospheric pressure.
- In equimolar solutions, the concentration of solute particles is the same in each solution.
- Boiling point elevation is a colligative property, which means it depends on the number of solute particles, not their identity.
- According to Raoult's law, the vapor pressure of a solvent above a solution is directly proportional to the mole fraction of the solvent in the solution.
- In equimolar solutions, the mole fraction of the solvent is the same, so the vapor pressure of the solvent will also be the same.
- Therefore, equimolar solutions in the same solvent will have the same boiling point because their vapor pressures are equal.
Freezing Point of Equimolar Solutions
- Freezing point is the temperature at which a liquid changes into a solid at a given pressure.
- In equimolar solutions, the concentration of solute particles is the same in each solution.
- Freezing point depression is a colligative property, which means it depends on the number of solute particles, not their identity.
- According to Raoult's law, the vapor pressure of a solvent above a solution is directly proportional to the mole fraction of the solvent in the solution.
- When a solute is added to a solvent, it disrupts the regular arrangement of solvent molecules, making it more difficult for the solvent to freeze.
- Therefore, equimolar solutions in the same solvent will have the same freezing point because their vapor pressures are equal and the presence of solute particles lowers the freezing point of the solvent.
Therefore, equimolar solutions in the same solvent have the same boiling and freezing point because both boiling point elevation and freezing point depression are colligative properties that depend on the number of solute particles and not their identity.
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Equimolar solutions in the same solvent havea)same boiling and freezing pointb)different boiling and freezing pointc)same freezing point but different boiling pointd)same boiling point, but different freezing pointCorrect answer is option 'A'. Can you explain this answer?
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