Zinc Sulfide Precipitation

ZnSO4 + Na2S → ZnS↓ + Na2SO4

概要

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.

参加者

役割 物質 係数 状態
反応物 Zinc Sulfate ZnSO₄ 1 (aq)
生成物 Sodium Sulfate Na₂SO₄ 1 (aq)

日常の例

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

産業上の重要性

閃亜鉛鉱（ZnS）は世界最大の亜鉛鉱石である。ZnS蛍光体はディスプレイ技術、X線スクリーン、蛍光コーティングに使用される。

特性

タイプ
Precipitation
可逆的
いいえ
エネルギー
発熱性
ΔH
-65.0 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 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.