Question #03339

1 Answer
Jan 3, 2016

Answer:

a) Molality and d) mole fraction are not affected by temperature.

Explanation:

a) Molality

#"Molality" = "moles of solute"/"kilograms of solute"#

Both moles and kilograms are measures of mass, and mass does not change with temperature.

∴ Molality is not affected by temperature.

b) Molarity

#"Molarity" = "moles of solute"/"litres of solution"#

The volume of a liquid changes with temperature, so molarity is affected by temperature.

c) Normality

#"Normality" = "equivalents of solute"/"litres of solution"#

Normality depends on the volume of solution, so normality is affected by temperature.

d) Mole fraction

#"Mole fraction" = "moles of component"/"total moles"#

Moles do not change with temperature, so mole fraction is not affected by temperature.