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The composition of wustite is F e 0.95 O 1 . What is the percentage of iron as F e 3 + ions?

Options

  1. A10.5
  2. B25
  3. C35
  4. D45

Correct answer

A. 10.5

Step-by-step solution

F e 0.95 O 1 Let there are x ions of F e 3 + then 0.95 - x ions will be F e 2 + . Compound is electrically neutral. + 3 x + 2 ( 0.95 - x ) - 2 = 0 3 x + 1.90 - 2 x - 2 = 0 x = 0.1 % F e 3 + = 0.1 0.95 × 100 = 10.5

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