Question

A solution of $H_{2}S{O}_4$ has a strength of 4.9 g/L. Find the molarity of the solution.

• A. 0.05 M
• B. 0.08 M
• C. 1.00 M
• D. 1.25 M

Answer 1

The correct option is A 0.05 M

4.9 g of $H_{2}S{O}_4$ is present in 1000 mL of solution.
Number of moles =
$\frac{\text{given mass}}{\text{molar mass}}=\frac{4.9}{98}=0.05$

Molarity = $\frac{\text{number of moles}}{\text{total volume (mL)}}\times 1000$
Molarity = 0.05 M