Nickel (2) Oxide
The oxidation number of nickel (Ni) in NiO2 is +4. Oxygen typically has an oxidation number of -2, so the total oxidation number of the compound is 0. Since there are two oxygen atoms in NiO2, the oxidation number of nickel must be +4 to balance out the charge.
No, Ni2O4 and NiO2 are not the same compounds. NiO2 typically refers to nickel(IV) oxide, while Ni2O4 can be understood as nickel(II) oxide in a different stoichiometric form, often indicating a mixed valence state or specific structural arrangement. Their chemical compositions and properties differ, leading to distinct behaviors in chemical reactions and applications.
Nickel (I) oxide + nitric acid ----------> nickel nitrate + water Ni2O + 2HNO3 ----------> 2NiNO3 + H2O
The oxidation number for Ni in NiO2 is +4. Nickel is known to have variable oxidation states, and in this compound, it is bonded to two oxygen atoms which have an oxidation number of -2 each. The overall charge of the compound is neutral.
H3NiO3 Synonyms are: Nickel hydroxide (Ni(OH)3) ; Nickel(III) hydroxide: (Nickelic hydroxide)