Q.

The composition of a sample of Wurtztite is Fe0.93O. What is the percentage of iron present as Fe3+ in total iron?

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a

15.05%

b

25%

c

35%

d

45%

answer is A.

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Detailed Solution

Three Fe2+ replaced by two Fe3+total loss of iron =0.07moleSo, mole of Fe3+ present in Fe0.93O=2 x 0.07∴ % of Fe3+ in total iron content=2×0.070.93×100=15.05
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