Question

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

Answer 1

Molarity is defined as the ratio no. Of moles of solute to the volume of solution in litres. 

Molality is defined as the no. Of moles of solute in 1 Kg of solvent. 

On changing temp.molarity changes as volume changes but molality remains unaffected as mass of solvent remains unchanged on changing temp.