Question

Of the following terms used for denoting concentration of a solution, the one which does not get affected by temperature is __________.

• A. Molarity
• B. Molality
• C. Normality
• D. Formality

Answer 1

Answer: (B)

Molality

Molality does not get affected by temperature. Molality is the ratio of the number of moles of solute to the mass of solvent (in kg). Both numerator and denominator contains mass terms only and mass is not affected by temperature. Molarity, normality and formality contains volume terms and hence are affected by temperature.