1.

The composition of a sample of wurtzite is Fe_(0.93)O_(1.00) what % of Iron present in theform of Fe^(3+)?

Answer»

`16.05%`
`15.05%`
`18.05%`
`17.05%`

SOLUTION :Hint : Let the number of `FE^(2+)` IONS in the crystal be X
The number of `Fe^(3+)` ions in the crystal be y
Total number of `Fe^(2+) and Fe^(3+)` ions is `x+y`. Given that `x+y=0.93`
The total charge `=0x(2+)+(0.93-x)(+3)-2=0`
`2x+2.97-3x-2=0x=0.79`
`"Percentage of "Fe^(3+)=(((0.93-0.79))/(0.93))100=15.05%`


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