Question

For the balance redox reaction
$a{NO}_3^{-}+b{As}_2{S}_3+4H_{2}O⟶xAs{O}_4^{-3}+z{SO}_4^{-2}+8H^{+}$
Which of the statement(s) is/are correct?

• A. Equivalent weight of ${As}_2{S}_3$ is $M/24$ where $M$ is molecular weight of ${As}_2{S}_3$
• B. $a:b=8:1$
• C. The value of $(a+2b)/(x+y)$ is $1$
• D. The value of $(z-x)/3$ is $1$

Answer 1

Answer: (A)

Equivalent weight of ${As}_2{S}_3$ is $M/24$ where $M$ is molecular weight of ${As}_2{S}_3$

Equivalent weight $=$ Molar mass

$n$ factor

$n$ factor of $A{s}_2{S}_3$ is $8\times 3=24$

as $S^{2-}$ changes to $S^{+6}$