Question:
In which mode of expression, the concentration of a solution remains independent of temperature?
In which mode of expression, the concentration of a solution remains independent of temperature?
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Molality is used in colligative properties calculations because it remains constant irrespective of temperature changes.
Updated On: Mar 25, 2025
- Molarity
- Normality
- Formality
- Molality
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The Correct Option is D
Solution and Explanation
Step 1: {Understanding concentration units}
Molarity \( (M) \) and normality \( (N) \) depend on volume, which changes with temperature. However, molality \( (m) \) is defined as: \[ m = \frac{{Moles of solute}}{{Mass of solvent in kg}} \] Since mass is unaffected by temperature changes, molality remains constant.
Step 2: {Why molality is temperature-independent}
Molality does not involve volume, which expands or contracts with temperature. Hence, it is the preferred unit in temperature-dependent studies.
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