Copper(II) Hydroxide Precipitation

CuSO4 + 2NaOH → Cu(OH)2↓ + Na2SO4

概述

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.

参与者

角色 物质 系数 状态
反应物 Copper(II) Sulfate CuSO₄ 1 (aq)
反应物 Sodium Hydroxide NaOH 2 (aq)
产物 Sodium Sulfate Na₂SO₄ 1 (aq)

日常示例

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.

工业重要性

氢氧化铜用作杀菌剂(波尔多液)、铜电镀液,以及作为氧化铜催化剂的前驱体。

属性

类型
Precipitation
可逆
否
能量
放热
ΔH
-59.0 kJ/mol

相关反应

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.