Cobalt(II) Hydroxide Precipitation

CoCl₂ + 2NaOH → Co(OH)₂↓ + 2NaCl

Descripción general

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.

Participantes

Rol	Sustancia	Coeficiente	Estado
Reactivo	Sodium Hydroxide NaOH	2	(aq)
Producto	Sodium Chloride NaCl	2	(aq)

Ejemplo cotidiano

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

Importancia industrial

El hidróxido de cobalto es un precursor para los cátodos de óxido de litio y cobalto en las baterías de iones de litio utilizadas en smartphones y vehículos eléctricos.

Propiedades

Tipo: Precipitation
Reversible: No
Energía: Exotérmico
ΔH: -52,0 kJ/mol

Reacciones relacionadas

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.