Question

In the reaction,
$I{O}_3^{-}+S{O}_2+4H_{2}O\to I_2+S{O}_4^{2-}+8H^{+}$
the coefficient of $S{O}_2$ is:

• A. 3
• B. 4
• C. 5
• D. 6

Answer 1

Answer: (C)

Balanced equation is

$2I{O}_3^{-}+5S{O}_2+4H_{2}O\to I_2+5S{O}_4^{2-}+8H^{+}$

The coefficient of $S{O}_2$ is $5.$