A solution is prepared by dissolving of in of a solvent of density . The molality of the solution is — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question

💡 Solution & Explanation

$\text{Mass of solvent} = 1250 \times 0.8 = 1000\text{ g} = 1\text{ kg}$. $\text{Moles of } NaOH = 10/40 = 0.25$. $\text{Molality} = 0.25 / 1 = 0.25\text{ m}$.