Cobalt(II) Hydroxide Precipitation

CoCl2 + 2NaOH → Co(OH)2↓ + 2NaCl

अवलोकन

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.

प्रतिभागी

भूमिका पदार्थ गुणांक अवस्था
अभिकारक Sodium Hydroxide NaOH 2 (aq)
उत्पाद Sodium Chloride NaCl 2 (aq)

रोजमर्रा का उदाहरण

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

औद्योगिक महत्व

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

गुण

प्रकार
Precipitation
प्रतिवर्ती
नहीं
ऊर्जा
ऊष्माक्षेपी
ΔH
-52.0 kJ/mol

संबंधित अभिक्रियाएँ

Aluminum Hydroxide Precipitation Barium Sulfate Precipitation Cadmium Sulfide Precipitation (Yellow) Calcium Phosphate Precipitation (Bone Mineral) Chromium(III) Hydroxide Precipitation Lead Carbonate Precipitation Magnesium Hydroxide Precipitation Copper Sulfide Precipitation Mercury(II) Sulfide Precipitation (Vermilion) 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.