What is NiO? Important knowledge about NiO.

NiO Definition:
1.1 Names
1.1.1 Common name: NiO or Nickel Oxide
1.1.2 English name: Nickel(II) oxide
1.2. Atomic mass:
NiO consists of 2 chemical elements which are Ni (Nickel) and O (Oxygen) in a 1:1 ratio.
1.3. Atomic weight
1.3.1 Molecular structure: The atomic weight of NiO is 74.69 g/mol.
1.4 Ion structure: NiO consists of nickel ion Ni₂+ and oxygen ion O₂-.

Properties of NiO:
2.1 Physical properties of NiO
State: solid at room temperature.
Color: black or dark green.
Smell: odorless.
pH: affected by the environment of dissolution.
2.2 Chemical properties of NiO: NiO is quite stable, insoluble in water, and soluble in acid.

Common chemical equations for NiO:
Acid reaction: NiO can react with a strong acid to form salt and water, for example, the reaction with hydrochloric acid: NiO + 2HCl -> NiCl₂ + H₂O.

NiO Preparation
4.1 Laboratory preparation of NiO:
NiO can be prepared from the oxidation reaction of nickel in air at high temperature: 2Ni + O₂ -> 2NiO.
4.2 Industrial preparation of NiO:
NiO is usually produced from the oxidation process of nickel in a furnace at a temperature of about 1000 – 1200 degrees Celsius.