Sodium Sulfide and Copper(II) Sulfate

Na2S + CuSO4 → CuS + Na2SO4

概述

Sodium sulfide reacts with copper(II) sulfate to form a black precipitate of copper(II) sulfide and sodium sulfate. CuS is extremely insoluble, making this a useful test for copper ions. The black precipitate forms instantly upon mixing.

参与者

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

日常示例

The black tarnish on silver jewelry involves a similar sulfide precipitation reaction when silver contacts sulfur-containing substances.

工业重要性

硫化物沉淀法用于采矿废水处理，选择性沉淀去除铜、锌、铅等重金属离子，是重要的环保技术。

属性

类型
Double Replacement
可逆
否
能量
放热
ΔH
-84.0 kJ/mol

相关反应

Iron(III) Chloride and Sodium Hydroxide Ammonia and Hydrochloric Acid (White Smoke) Calcium Carbonate and Hydrochloric Acid Calcium Chloride and Sodium Carbonate Barium Chloride and Sodium Sulfate Precipitation Calcium Hydroxide and Carbon Dioxide (Limewater Test) Sodium Hydroxide and Iron(III) Chloride (Rust Color) Sodium Hydroxide and Hydrochloric Acid Neutralization Potassium Hydroxide and Sulfuric Acid Aluminum Hydroxide and Hydrochloric Acid

Frequently Asked Questions

What is the equation for Sodium Sulfide and Copper(II) Sulfate?
The balanced equation is: Na₂S + CuSO₄ → CuS + Na₂SO₄.
What type of reaction is Sodium Sulfide and Copper(II) Sulfate?
Sodium Sulfide and Copper(II) Sulfate is a double replacement reaction.
Is Sodium Sulfide and Copper(II) Sulfate exothermic or endothermic?
Sodium Sulfide and Copper(II) Sulfate is exothermic (releases energy). The enthalpy change (ΔH) is -84.0 kJ/mol.