Question

3 L of water is added to 2 L of a 5 M $HCl$ solution. What is the molarity of the resultant solution?

• A. 2.5
• B. 2 M
• C. 4 m
• D. 4.5 M

Answer 1

The correct option is B 2 M

Given: $M_1$ = 5 M; $V_1=$ 2 L and $V_2=(3+2)$ L = 5 L
As per the concept of dilution,
$M_1{V}_1=M_2{V}_2$
$\Rightarrow (5\times 2)=M_2\times 5$
So, $M_2=2$ M