Question

Calculate Molarity of a solution having $2.6\times {10}^{-3}$ mole solute dissolved in 250 ml solution.

• A. 0.0104 M
• B. 2.6 M
• C. 0.026 M
• D. 0.104 M

Answer 1

The correct option is A

0.0104 M

We know that,
Molarity = $\frac{No.ofmoles}{No.oflitresofsolution}$

Number of moles of the solute is equal to $2.6\times {10}^{-3}$
No. of litres of solution = $250\times {10}^{-3}=0.25$ litres
$\therefore$ Molarity $=\frac{2.6\times {10}^{-3}}{0.25}=0.0104M$