Question

What will be the molarity of a solution which contains $5.85g$ of $NaCl\left(s\right)$ per $500$ ml?

• A. $4mol{L}^{-1}$
• B. $20mol{L}^{-1}$
• C. $0.2mol{L}^{-1}$
• D. $2mol{L}^{-1}$

Answer 1

The correct option is C $0.2mol{L}^{-1}$

The expression for the molarity of the solution is:

$Molarity=\frac{\text{Mass of NaCl}}{\text{Molar mass of NaCl}\times \text{Volume of NaCl solution}\left(inL\right)}$

Substituting values in the above expression, we get-

$Molarity=\frac{5.85}{58.5\times 0.5}=0.2mol{L}^{-1}$

Hence, option C is correct.