Question

Find out and write the oxidation state of Fe in FeCl2 and Fecl3.

Answer 1

In FeCl2, the Fe2+ ion has oxidation number +2. The total of the oxidation numbers of all the atoms or ions in a neutral compound is defined as zero. There are two Cl- ions in the compound, so each Cl must have oxidation number -1.

Answer 2

The oxidation state of Fe in $FeCl_2$ and $FeCl_3$ is +2 and +3 respectively.

Explanation:

For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.  

a) In $FeCl_2$, Fe is having an oxidation state of +2 and chloride anion with oxidation state of -1. They combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral $FeCl_2$

b) In $FeCl_3$, Fe is having an oxidation state of +3 and chloride anion with oxidation state of -1. They combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral $FeCl_3$

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