Question

What will be the molality of the solution made by dissolving 10 g of NaOH in 100 g of water?

• A. $2.5m$
• B. 5m
• C. 10 m
• D. $1.25m$

Answer 1

Answer: (A)

$2.5m$

Answer 2

(1) : Molality

= $\frac{Wt.ofsolute}{Mol.wt.ofsolute} \times$ $$\frac{1000}{Wt.ofsolvent}$$

$m = \frac{10}{40} \times \frac{1000}{100} = 2.5$m