Question

Density of a solution containing $14\%$ by mass of sulphuric acid is $1.05$ g/ml. The molarity of solution is :

• A. $1.0M$
• B. $1.5M$
• C. $2.0M$
• D. $2.5M$

Answer 1

The correct option is B $1.5M$

The density of the solution is $1.05$ g/ml. The solution contains $14\%$ by mass of sulphuric acid.

Thus, $1$ L ($1000$ ml) of solution will contain $1.05\times 1000\times \frac{14}{100}g=147$ g sulphuric acid.

This corresponds to $\frac{147}{98}=1.5$ mol of sulfuric acid.

Hence, the molarity of the solution is $1.5M$.