Question

$H_2{O}_2$ is used as what?

• A. An oxidant only
• B. A reductant only
• C. An acid only
• D. An oxidant, a reductant and an acid

Answer 1

Answer: (A), (B), (C)

The correct options are
A

An oxidant only

B

A reductant only

C

An acid only

As an oxidant:
$2F{e}^{2+}\left(aq\right)+H_2{O}_2+2H^{+}\left(aq\right)⟶2F{e}^{3+}\left(aq\right)+2H_{2}O\left(l\right)$

As as reductant (these reactions are apt to produce $O_2$ in lab):
$NaOCl+H_2{O}_2⟶O_2+NaCl+H_{2}O$

$2KMn{O}_4+3H_2{O}_2⟶2Mn{O}_2$
$+2KOH+2H_{2}O+3O_2$

Hydrogen peroxide is a weak acid, forming hydroperoxide or peroxide salts with many metals.