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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 nonstoichiometric defect is present in this sample ? |
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Answer» Solution :Let number of O-atoms = 100 `therefore`Number of FE atoms = 93 Let number of `Fe^(2+)` ions = x `therefore` Number of `Fe^(3+)` ions `= (93 - x)` SINCE compound is neutral. We have `2.x + 3(93 - x) = 2 xx 100` `therefore 2x + 279 - 3x = 200` `therefore x = 79` Fraction of `Fe^(2+)` ions present `= 79/93 = 0.849` Metal deficiency defect is present in the SAMPLE because Fe are less in amount than OXYGEN required for stoichiometric proportion. |
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