Question

2.46 g of sodium hydroxide (molar mass = 40) are dissolved in water and the solution is made to 100 $c{m}^3$ in a volumetric flask. Calculate the molarity of the solution.

• A. 0.555 M
• B. 0.516 M
• C. 0.615 M
• D. 0.715 M

Answer 1

The correct option is C 0.615 M

weight of the solute = 2.46gm

molar mass of the solute = 40g/ml

volume of the solution = 100ml

so,Molarity = $\frac{1000\times w_2}{V\times M_2}$

= $\frac{1000\times 2.46}{100\times 40}$

so molartity = 0.615M

so answer is 0.615

ans is C