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Karley
Chemistry
21 October, 10:42
What is the oxidation number of Ni in NiO
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Linnea
21 October, 10:56
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+2
Explanation:
Nickel (II) oxide, or NiO, is an ionic compound. Recalling a few rules of determining the oxidation number of substances:
1. Oxidation numbers of elements in ionic compounds are usually their own ionic charge
2. The total oxidation number of a neutral compound should be 0
And,
3. The oxidation number of oxygen in most cases is - 2.
Therefore, since O in NiO has a oxidation number of - 2, and nickel (II) ion usually has a charge of 2+, the oxidation number of Ni in NiO is + 2 (always remember to put the positive sign in front of the number)
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