Question

A sample of $H_2{SO}_4$ (density $1.8g/ml$) is $90$% by weight. What is the volume of the acid that has to be used to make $1$ litre of $0.2M$ $H_2{SO}_4$?

• A. $16mL$
• B. $10mL$
• C. $12mL$
• D. $18mL$

Answer 1

Answer: (C)

$12mL$

Molarity =$10\times x\times \frac{d}{M}$

where,

$x=$ Mass of solute

$M=$ Molecular mass of $H_{2}S{O}_4$

$d=$ Density of solution

$M=16.53M$

$M_{1}V=M_2{V}_2$

$16.53\times x=1000\times 0.2$

$X$=$12.09$ $\approx$ $12$

Hence $12mL$ is the answer.

The correct option is C.