The density of solution of is . The molality of the solution is: — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question
Question
The density of $1\text{ M}$ solution of $NaCl$ is $1.0585\text{ g/mL}$. The molality of the solution is:
Answer: B
💡 Solution & Explanation
$\text{Mass of 1L solution} = 1058.5\text{ g}$. $\text{Mass of solute} = 1 \times 58.5 = 58.5\text{ g}$. <br>$\text{Mass of solvent} = 1058.5 - 58.5 = 1000\text{ g} = 1\text{ kg}$. <br>$\text{Molality} = 1 / 1 = 1\text{ m}$.
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