Question

The molarity of a solution containing 4 g of NaOH in 250 mL solution is:

• A. 0.1 M
• B. 0.4 M
• C. 0.2 M
• D. 1 M

Hint:

Molarity = moles / volume (in litres).

Answer 1

The Correct Option is B

Moles of NaOH \(= \frac{4}{40} = 0.1\) Volume \(= 0.25\) L \[ M = \frac{0.1}{0.25} = 0.4\ \text{M} \]