Copper(II) Hydroxide Precipitation

CuSO₄ + 2NaOH → Cu(OH)₂↓ + Na₂SO₄

Обзор

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.

Участники

Роль	Вещество	Коэффициент	Состояние
Реагент	Copper(II) Sulfate CuSO₄	1	(aq)
Реагент	Sodium Hydroxide NaOH	2	(aq)
Продукт	Sodium Sulfate Na₂SO₄	1	(aq)

Пример из жизни

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.

Промышленное значение

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

Свойства

Тип: Precipitation
Обратимая: Нет
Энергия: Экзотермическая
ΔH: -59,0 kJ/mol

Связанные реакции

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 Cobalt(II) Hydroxide 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.