Colligative: Boiling Point Elevation
Easychemistry
Which parameter affects boiling point elevation (ΔTb) directly?
Select the correct option:
Solution
Incorrect! Answer:
Molality
- The Formula: ΔTb=Kb×m×i.
- Breakdown:
- ΔTb: Elevation in boiling point.
- Kb: Ebullioscopic constant (solvent property).
- m: Molality (concentration of solute particles per kg of solvent).
- i: van't Hoff factor (degree of dissociation/association).
- Colligative Property: These properties depend only on the number of solute particles, not their identity (color, pH, reactive nature).
- Mechanism: Non-volatile solute particles block the escape of solvent molecules, lowering vapor pressure. Thus, more heat is needed to reach atmospheric pressure, raising the boiling point proportional to the molality.
🔒 Solution Hidden from View
Submit your answer to unlock the detailed step-by-step solution.
About This Question
- Subject
- chemistry
- Chapter
- solutions
- Topic
- colligative: boiling point elevation
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Molality
- The Formula: ΔTb=Kb×m×i.
- Breakdown:
- ΔTb: Elevation in boiling point.
- Kb: Ebullioscopic constant (solvent property).
- m: Molality (concentration of solute particles per kg of solvent).
- i: van't Hoff factor (degree of dissociation/association).
- Colligative Property: These properties depend only on the number of solute particles, not their identity (color, pH, reactive nature).
- Mechanism: Non-volatile solute particles block the escape of solvent molecules, lowering vapor pressure. Thus, more heat is needed to reach atmospheric pressure, raising the boiling point proportional to the molality.
This easy difficulty chemistry question is from the chapter solutions, covering the topic of colligative: boiling point elevation. It appeared in the 2025 exam.
Looking for more practice? Explore all chemistry questions or browse solutions questions on RankGuru.