Cobalt(II) Hydroxide Precipitation

CoCl2 + 2NaOH → Co(OH)2↓ + 2NaCl

نظرة عامة

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.

المشاركون

الدور المادة المعامل الحالة
متفاعل Sodium Hydroxide NaOH 2 (aq)
منتج Sodium Chloride NaCl 2 (aq)

مثال من الحياة اليومية

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

الأهمية الصناعية

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

الخصائص

النوع
Precipitation
قابل للعكس
لا
الطاقة
طارد للحرارة
ΔH
-52,0 kJ/mol

التفاعلات ذات الصلة

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.