What is Co(OH)2? The important knowledge about Co(OH)2.

  1. Definition of Co(OH)2

1.1 Names
1.1.1 Common name: Cobalt(II) hydroxide
1.1.2 English name: Cobalt(II) hydroxide
1.2. Atomic mass: 92.94 g/mol
1.3. Atomic weight: 92.94 g/mol
1.3.1 Molecular structure: Co(OH)2 is a compound with cobalt as the central atom, surrounded by two hydroxide ions with an octahedral geometric shape.
1.4 Ion structure: the presence of cobalt(II) ions Co2+ and hydroxide ions OH-

  1. Properties: Co(OH)2

2.1 Physical properties of Co(OH)2
State: solid
Color: light blue
Odor: odorless
PH level: alkaline, with a PH > 7
2.2 Chemical properties of Co(OH)2: Co(OH)2 has the ability to react with strong acids to form cobalt(II) salts.

  1. Common chemical reactions of Co(OH)2
    Reaction with acid:
    Co(OH)2 + 2HCl -> CoCl2 + 2H2O
    Co(OH)2 + H2SO4 -> CoSO4 + 2H2O
    Reaction with salt:
    Co(OH)2 + 2NH4Cl -> CoCl2 + 2NH4OH

  2. Preparation of Co(OH)2

4.1 Laboratory preparation of Co(OH)2: Co(OH)2 can be prepared by reacting cobalt(II) chloride with sodium hydroxide solution.
CoCl2 + 2NaOH -> Co(OH)2 + 2NaCl
4.2 Industrial preparation of Co(OH)2: In industry, Co(OH)2 is commonly produced by reacting cobalt(II) sulfate with sodium hydroxide.
CoSO4 + 2NaOH -> Co(OH)2 + Na2SO4

Leave a Comment