What is the mole fraction of solute in a 3.22 𝑚 aqueous solution?

Answer 1

Considering that molality (m) = moles solute / kg solvent, we can assume we have 1 kg of solvent for this particular problem.

Given 1 kg solvent (H2O), that means we have 3.22 moles of solute.

Moles of H2O = 1000. g H2O x 1 mol /18.0 g = 55.6 moles H2O

Total moles of H2O + solute = 3.22 + 55.6 = 58.8 moles

mole fraction solute = 3.22 moles / 58.8 moles = 0.0548