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A sample of ferrous oxide has actual...

A sample of ferrous oxide has actual formula `Fe_(0.93)O_(1.00)` .In this sample what fraction of metal ions are `Fe^(2+)` ions ? What type of non - stoichiometric defect is present in this sample ?

A

85

B

15

C

`7.00`

D

`93.00`

Text Solution

Verified by Experts

The correct Answer is:
B
Let the sample contains 93 iron ions and 100 oxide ions
Total negative charge on oxide ions
=`2times100=200`
Let no. of ions of iron as `Fe^(3+)=x`
`therefore `No. of`Fe^(2+)ions=93-x`
`xtimes3+(93-x)2=200`
`3x-186-2x=200`
x=200-186
x=14
Percentage of iron as `Fe^(3+)`
=`14/93times100=15.05`
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