Copper Sulfide Precipitation

CuSO₄ + Na₂S → CuS↓ + Na₂SO₄

نظرة عامة

Copper sulfate reacts with sodium sulfide to form a black precipitate of copper(II) sulfide (Ksp = 1.3 × 10⁻³⁶). CuS is one of the most insoluble compounds known. The jet-black precipitate forms instantly and is used to identify Cu²⁺ ions in systematic qualitative analysis.

المشاركون

الدور	المادة	المعامل	الحالة
متفاعل	Copper(II) Sulfate CuSO₄	1	(aq)
منتج	Sodium Sulfate Na₂SO₄	1	(aq)

مثال من الحياة اليومية

The black tarnish on copper pots exposed to sulfur-containing foods (eggs, garlic) is related to copper sulfide formation.

الأهمية الصناعية

Sulfide precipitation is used in mining wastewater treatment to remove heavy metals. CuS (covellite) is also a naturally occurring copper ore mineral.

الخصائص

النوع: Precipitation
قابل للعكس: لا
الطاقة: طارد للحرارة
ΔH: -84,0 kJ/mol

التفاعلات ذات الصلة

Aluminum Hydroxide Precipitation Barium Sulfate Precipitation Cadmium Sulfide Precipitation (Yellow) Calcium Phosphate Precipitation (Bone Mineral) Chromium(III) Hydroxide Precipitation Lead Carbonate Precipitation Magnesium Hydroxide Precipitation Cobalt(II) Hydroxide Precipitation Mercury(II) Sulfide Precipitation (Vermilion) Iron(III) Hydroxide Precipitation

Frequently Asked Questions

What is the equation for Copper Sulfide Precipitation?

The balanced equation is: CuSO₄ + Na₂S → CuS↓ + Na₂SO₄.

What type of reaction is Copper Sulfide Precipitation?

Copper Sulfide Precipitation is a precipitation reaction.

Is Copper Sulfide Precipitation exothermic or endothermic?

Copper Sulfide Precipitation is exothermic (releases energy). The enthalpy change (ΔH) is -84.0 kJ/mol.