Question

The solution of sulphuric acid contains 80% by weight $H_{2}S{O}_4$. Specific gravity of this solution is 1.71. Its normality is about

• A. 18
• B. 27.9
• C. 1
• D. 10

Answer 1

The correct option is B 27.9

$N=\frac{10\times sp.gr.ofthesolution\times wt.\%ofsolute\times Mol.wt.}{Molecularwt.ofsolute\times Eq.wt.}$
$N=\frac{10\times 1.71\times 80\times 98}{98\times 49}=27.9$