Zinc Sulfide Precipitation

ZnSO4 + Na2S → ZnS↓ + Na2SO4

概述

Zinc sulfate reacts with sodium sulfide to form a white precipitate of zinc sulfide (Ksp = 2 × 10⁻²⁵). ZnS occurs naturally as the mineral sphalerite, the most important zinc ore. Zinc sulfide phosphors are used in cathode ray tubes and luminous paints.

参与者

角色 物质 系数 状态
反应物 Zinc Sulfate ZnSO₄ 1 (aq)
产物 Sodium Sulfate Na₂SO₄ 1 (aq)

日常示例

Glow-in-the-dark toys and watch dials often use zinc sulfide phosphors doped with copper, which glow green after light exposure.

工业重要性

闪锌矿（ZnS）是全球最重要的锌矿石。ZnS磷光体广泛用于显示技术、X射线荧光屏和发光涂料。

属性

类型
Precipitation
可逆
否
能量
放热
ΔH
-65.0 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 Zinc Sulfide Precipitation?
The balanced equation is: ZnSO₄ + Na₂S → ZnS↓ + Na₂SO₄.
What type of reaction is Zinc Sulfide Precipitation?
Zinc Sulfide Precipitation is a precipitation reaction.
Is Zinc Sulfide Precipitation exothermic or endothermic?
Zinc Sulfide Precipitation is exothermic (releases energy). The enthalpy change (ΔH) is -65.0 kJ/mol.