Question

What is the correct unit for the following solution?
$0.5moles$ of $HCl$ dissolved in $0.25L$ of the solution.

• A. $w/w$
• B. $m$
• C. $2M$
• D. $v/v$

Answer 1

Answer: (C)

$2M$

Molarity is the concentration of solution expressed as number moles of solute per litre of solution units of Molarity (M).

Here, $0.5moles$ of HCl dissolve in $0.25L$ which has molarity of $\frac{0.5}{0.25}=2M$