MCQ
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$18$
- ✓$27.9$
- C$1$
- D$10$
✓
Answer
Correct option: B.
$27.9$
b
(b)$N = \frac{{10 \times {\rm{sp}}{\rm{. gr}}{\rm{. of the solution}} \times {\rm{wt}}{\rm{. \% of solute}} \times {\rm{Mol}}{\rm{. wt}}{\rm{.}}}}{{{\rm{Molecular wt}}{\rm{. of solute}} \times {\rm{Eq}}{\rm{. wt}}{\rm{.}}}}$
(b)$N = \frac{{10 \times {\rm{sp}}{\rm{. gr}}{\rm{. of the solution}} \times {\rm{wt}}{\rm{. \% of solute}} \times {\rm{Mol}}{\rm{. wt}}{\rm{.}}}}{{{\rm{Molecular wt}}{\rm{. of solute}} \times {\rm{Eq}}{\rm{. wt}}{\rm{.}}}}$
$N = \frac{{10 \times 1.71 \times 80 \times 98}}{{98 \times 49}} = 27.9$
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