# Question #4822a

Jun 18, 2015

Both $F e C {l}_{2}$ and $N {a}_{2} S {O}_{3}$ can act as reducing agents

#### Explanation:

Oxidation is loss of electrons. Reduction is gain of electrons.

An oxidising agent takes in electrons. A reducing agent gives them out.

Both ozone and chlorine are powerful oxidising agents.

Iron(II) choride can lose electrons to form iron(III):

$F {e}^{2 +} \rightarrow F {e}^{3 +} + e$

A solution of iron(II) chloride will slowly oxidise to iron(III) in the presence of air.

Sodium sulfite is also a reducing agent:

$S {O}_{3}^{2 -} + {H}_{2} O \rightarrow S {O}_{4}^{2 -} + 2 {H}^{+} + 2 e$

It is used as an anti - oxidant in food preservation.