CBSE Class 12 · 2011 · All India · SolutionsShort Answer

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Differentiate between molality and molarity of a solution. What is the effect of change in temperature on molarity and molality values?

Solution

Molality (

m

): moles of solute per kilogram of solvent.
Molarity (

M

): moles of solute per litre of solution.
Effect of temperature: the volume of a solution changes with temperature, so molarity changes (decreases on heating); masses do not change, so molality is independent of temperature.

CBSE Class 12 Board · 2011 · All India · Subjective

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