Question

Select the oxidant in the given reactions.
$KI{O}_3+5KI+6HCl\to 3I_2+6KCl+3H_{2}O$

Answer 1

$KI{O}_3+5KI+6HCl\to 3I_2+6KCl+3H_{2}O$

$I^{-}\to I_2$ oxidation

Here, the oxidation number is changing from -1 to 0, so oxidation is taking place and hence, $KI$ acts as a reductant.

$\therefore I^{-}$ is reductant.

${I{O}_3}^{-}\to I_2$

Here, the oxidation number is changing from +5 to 0, so the reduction is taking place and hence, acts as an oxidant.

$\therefore I{O}_3^{-}$ is oxidant

i.e, $KI{O}_3$ is oxidant