Which of the following concentration terms do not change with temperature for a given aqueous solution (ignore evaporation)?

AMolarity
BMolality
Cppm by mass
DMole fraction

Answer: B, C, D

Molality, mole fraction and ppm by mass are defined with masses or moles, which do not depend on temperature. Molarity uses the solution volume, which expands or contracts with temperature, so it changes.

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