Which of the following is/are correct for a solution with mole fraction of solute in water? — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question

💡 Solution & Explanation

$\chi_w = 1 - 0.2 = 0.8$. <br>$\text{Ratio} = 0.2/0.8 = 1/4$. <br>$\text{Molality} = (0.2 \times 1000) / (0.8 \times 18) = 13.88 \text{ m}$. <br>Formula for molality using $\chi$ only uses solvent MW, so it's the same for any solute.