Question

What volume of 12.5 M concentrated HCl is required to make 1 L of 0.1 M HCl solution?

• A. 7 mL
• B. 8 mL
• C. 9 mL
• D. 10 mL

Answer 1

The correct option is B 8 mL

Let us assume that $VmL$ of $12.5MHCl$ is required to make $1L$ of $0.1MHCl$ solution.

Using the concept of dilution,
$\text{Moles of HCl in V mL of 12.5 M Solution = moles of HCl in 1000 mL of 0.1 M solution}$

Using the concept of dilution,
$12.5\times V=0.1\times 1000$
V = 8 mL

Therefore, 8 ml of 12.5 M HCl solution is required.