Copper Sulfide Precipitation

CuSO4 + Na2S → CuS↓ + Na2SO4

अवलोकन

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.

प्रतिभागी

भूमिका पदार्थ गुणांक अवस्था
अभिकारक Copper(II) Sulfate CuSO₄ 1 (aq)
उत्पाद Sodium Sulfate Na₂SO₄ 1 (aq)

रोजमर्रा का उदाहरण

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

औद्योगिक महत्व

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

गुण

प्रकार
Precipitation
प्रतिवर्ती
नहीं
ऊर्जा
ऊष्माक्षेपी
ΔH
-84.0 kJ/mol

संबंधित अभिक्रियाएँ

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 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.