Question

$28 NO^{-}_{3} + 3As_{2}S_{3} + 4H_{2}O \to 6ASO^{3-}_{4}+ 28 NO + 9SO^{2-}_{3} + H^{+}$ What will be the equivalent mass of $As_2S_3$ in the above reaction?

• A. $\frac{M. wt}{2}$
• B. $\frac{M. wt}{4}$
• C. $\frac{M. wt}{24}$
• D. $\frac{M. wt}{28}$

Answer 1

Answer: (D)

$Eq. mass=\frac{molecular\, mass}{n - factor} $
$ As_{2}^{+3} \to 2A s^{+5} n-factor \,4$
$ S_{2}^{-2} \to 3 \overset{+6}{S} 24$
total n-factor $= 28$
$Eq. mass =\frac{m.wt}{28}$