Copper(II) Hydroxide Precipitation

CuSO4 + 2NaOH → Cu(OH)2↓ + Na2SO4

概要

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.

参加者

役割 物質 係数 状態
反応物 Copper(II) Sulfate CuSO₄ 1 (aq)
反応物 Sodium Hydroxide NaOH 2 (aq)
生成物 Sodium Sulfate Na₂SO₄ 1 (aq)

日常の例

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.

産業上の重要性

水酸化銅は殺菌剤(ボルドー液)、銅めっき溶液、そして酸化銅触媒の前駆体として使用されています。

特性

タイプ
Precipitation
可逆的
いいえ
エネルギー
発熱性
ΔH
-59.0 kJ/mol

関連する反応

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.