Concentration Terms
Which concentration unit varies with temperature?
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About This Question
- Subject
- chemistry
- Chapter
- solutions
- Topic
- concentration terms
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Molarity (M)
- Definition of Molarity (M): M=Volume of solution in Litresmoles of solute.
- Temperature Effect: Matter expands upon heating and contracts upon cooling. Therefore, the Volume of a liquid solution changes as temperature varies.
- Result: Since the denominator (Volume) changes while the numerator (moles) stays constant, Molarity is temperature-dependent.
- Mass-based terms: Molality (m=mass of solventmoles), Mole fraction, and Mass percent are based solely on mass or moles.
- Conclusion: Mass and moles are fundamental properties that do not change with temperature, making these units temperature-independent.
This easy difficulty chemistry question is from the chapter solutions, covering the topic of concentration terms. It appeared in the 2025 exam.
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