Question

$40\text{mL}$ of a $20\text{M}HCl$ solution is diluted to $5\text{L}$. What is the final normality of $HCl$ solution?

• A. $0.5\text{N}$
• B. $1.0\text{N}$
• C. $0.16\text{N}$
• D. $0.8\text{N}$

Answer 1

The correct option is C $0.16\text{N}$

As per the concept of dilution,
$M_1{V}_1=M_2{V}_2$
$\Rightarrow (20\times 40)=(M\times 5000)$
On solving, $M=0.16\text{M}$
n-factor for $HCl=1$.
So, normality $=$ molarity
Concentration after dilution $=0.16\text{N}$