Question

The molarity of $HCl$ solution containing $0.4$ moles in $200ml$ of the solution is:

• A. 2 M
• B. 1 M
• C. 3 M
• D. 4 M

Answer 1

The correct option is A 2 M

Molarity (M): The number of moles of a solute dissolved in $1L(1000ml$) of the solution is known as the molarity of the solution.
Molarity $=\frac{\text{No. of moles of solute}}{\text{Volume of solution}}\times 1000=\frac{0.4\times 1000}{200}=2M$

Hence, option $A$ is correct.