Question

Density of a $H_2{SO}_4$ solution is $1.2g/ml$ and it is $40$ by weight. Determine molarity of this solution.

• A. $2.9M$
• B. $3.9M$
• C. $4.9M$
• D. $5.9M$

Answer 1

Answer: (C)

$4.9M$

Molarity= $\frac{\text{\% by mass}\times 1000\times density}{\text{Molar mass}\times 100}$

$=\frac{40\times 1000\times 1.2}{98\times 100}$

$=4.89M\approx 4.9M$