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Answer 1 · 2015-06-18T19:09:25

Both #FeCl_2# and #Na_2SO_3# can act as reducing agents

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):

#Fe^(2+)rarrFe^(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:

#SO_3^(2-)+H_2OrarrSO_4^(2-)+2H^(+)+2e#

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