Question

Analysis shows nickel oxide has the formulanio.R, o,.*. What fraction of ni exists as ni2* and ni3* ions in given oxide ?

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Secondary SchoolChemistry 15 points

Analysis shows that nickel oxide has the formula Ni0.98O1.00. What fractions of nickel exist as Ni 2+ and Ni 3+ ions?

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Answers

NamkeenCandy Ace

Hi there!

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Answer :

Ni_{0.98} O_{1.00} ;

Let Ni^{2+} be ' x ', therefore, Ni^{3+} will be 0.98 - x.

Total charge on compound is equal to zero.

∴ + 2x + 3(0.98 - x) - 2 = 0

⇒ 2x + 2.94 - 3x - 2 = 0

⇒ x = 0.94

∴ % of Ni^{2+} = \frac{0.94}{0.98} × 100 = 96%

and, % of Ni^{3+} = 4%