Chemistry, asked by tejasriteju003, 10 months ago

0 20/30 Iron oxide shows non-stoichiometric defect. It can exist in the form Feo 950.
What is the percentage of Fet2 ion present in Feo.950?
15.5%
11.5%
89.5%
85%

Answers

Answered by geovij1968
1

Analysis shows that FeO has a non-stoichiometric composition with formula Fe

0.95

O. In a stoichiometric composition of FeO, there will be one Fe

2+

ion for one O

2−

ion.

To maintain electrical neutrality, some Fe

2+

ions are missing from the crystal lattice. Hence, the number of ions of iron is less than the number of oxide ions.

The non - stoichiometry reflects the ease of oxidation of Fe

2+

to Fe

3+

effectively replacing a small portion ofFe

2+

with two thirds their number of Fe

3+

Thus for every "missing" Fe

2+

ions, the crystals contains two Fe

3+

ions to balance the charge. for example

3Fe

2+

= 2Fe

3+

to maintain electrical neutrality.

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