Copper(II) Hydroxide Precipitation

CuSO4 + 2NaOH → Cu(OH)2↓ + Na2SO4

Übersicht

Copper sulfate reacts with sodium hydroxide to form a pale blue gelatinous precipitate of copper(II) hydroxide (Ksp = 2.2 × 10⁻²⁰). The precipitate can be dehydrated by heating to produce black copper(II) oxide. This reaction is the basis of the Biuret test for proteins.

Teilnehmer

Rolle Substanz Koeffizient Zustand
Reaktant Copper(II) Sulfate CuSO₄ 1 (aq)
Reaktant Sodium Hydroxide NaOH 2 (aq)
Produkt Sodium Sulfate Na₂SO₄ 1 (aq)

Alltägliches Beispiel

The Biuret test for proteins uses Cu(OH)₂ formed from copper sulfate and NaOH; proteins turn the mixture violet due to copper-peptide bond complexation.

Industrielle Bedeutung

Copper hydroxide is used as a fungicide (Bordeaux mixture), in copper electroplating solutions, and as a precursor to copper oxide catalysts.

Eigenschaften

Typ
Precipitation
Reversibel
Nein
Energie
Exotherm
ΔH
-59,0 kJ/mol

Verwandte Reaktionen

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 Copper(II) Hydroxide Precipitation?
The balanced equation is: CuSO₄ + 2NaOH → Cu(OH)₂↓ + Na₂SO₄.
What type of reaction is Copper(II) Hydroxide Precipitation?
Copper(II) Hydroxide Precipitation is a precipitation reaction.
Is Copper(II) Hydroxide Precipitation exothermic or endothermic?
Copper(II) Hydroxide Precipitation is exothermic (releases energy). The enthalpy change (ΔH) is -59.0 kJ/mol.