Cobalt(II) Hydroxide Precipitation

CoCl2 + 2NaOH → Co(OH)2↓ + 2NaCl

Ikhtisar

Cobalt(II) chloride reacts with NaOH to form a blue or pink precipitate of cobalt(II) hydroxide (Ksp = 5.9 × 10⁻¹⁶). The initial blue precipitate converts to pink upon standing as the crystal structure rearranges. In air, it slowly oxidizes to brown Co(OH)₃.

Peserta

Peran Zat Koefisien Keadaan
Reaktan Sodium Hydroxide NaOH 2 (aq)
Produk Sodium Chloride NaCl 2 (aq)

Contoh Sehari-hari

Cobalt chloride paper changes from blue (dry) to pink (wet) and is used as a humidity indicator in weather instruments.

Pentingnya dalam Industri

Cobalt hydroxide is a precursor for lithium cobalt oxide cathodes in lithium-ion batteries used in smartphones and electric vehicles.

Sifat

Jenis
Precipitation
Dapat Dibalik
Tidak
Energi
Eksoterm
ΔH
-52,0 kJ/mol

Reaksi Terkait

Aluminum Hydroxide Precipitation Barium Carbonate Precipitation Barium Sulfate Precipitation Cadmium Sulfide Precipitation (Yellow) Calcium Fluoride Precipitation (Fluorite) Calcium Phosphate Precipitation (Bone Mineral) Chromium(III) Hydroxide Precipitation Lead Carbonate Precipitation Lead Chloride Precipitation Iron(III) Hydroxide Precipitation

Frequently Asked Questions

What is the equation for Cobalt(II) Hydroxide Precipitation?
The balanced equation is: CoCl₂ + 2NaOH → Co(OH)₂↓ + 2NaCl.
What type of reaction is Cobalt(II) Hydroxide Precipitation?
Cobalt(II) Hydroxide Precipitation is a precipitation reaction.
Is Cobalt(II) Hydroxide Precipitation exothermic or endothermic?
Cobalt(II) Hydroxide Precipitation is exothermic (releases energy). The enthalpy change (ΔH) is -52.0 kJ/mol.