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Analysis shows that nickel oxide has formula Ni_(0.98)O_(1.0). What fractions of the nickel exist as Ni^(2+) and Ni^(3+) ions ? |
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Answer» SOLUTION :`Ni_(0.98)O_(1.0)` is a non-stoichiometric compound and contains mixture of `Ni^(2+)` and `Ni^(3+)` ions. Let x atoms of `Ni^(2+)` ions be present in the compound. This means that x `Ni^(2+)` ions have been REPLACED by `Ni^(3+)` ions. No. of `Ni^(2+)` ions in the compound = 0.98 - x For ELECTRICAL NEUTRALITY, Total positive charge on the compound = Total negative charge on the compound `:.` 2 (0.98 - x) + 3X = 2 or 1.96 +x=2 or x=0.04 0.04 % of `Ni^(3+)` ions = `(0.04)/(0.98)xx100=4%` % of `Ni^(2+)` ions = `(0.98-0.04)/(0.98)xx100=96%` |
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