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The volume of a solution increases by 2 percent on heating while moles of solute remain same. What happens to molarity?

Answer and explanation

Correct answer: It slightly decreases

Molarity is defined by M = n/V. In this situation the number of solute moles, n, remains constant, while heating increases the solution volume V by 2%. Since the denominator becomes larger and the numerator is unchanged, the ratio decreases slightly. More precisely, the new value is M/1.02, about 98.04% of the original. Therefore option A is correct; molarity is temperature dependent.

Related tags

MolarityTemperature EffectVolume ExpansionConcentrationMole Concept And Molar MassSome Basic Concepts Of ChemistryChemistryClass 11 Mcq

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