Sodium Sulfide and Copper(II) Sulfate

Na2S + CuSO4 → CuS + Na2SO4

Descripción general

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.

Participantes

Rol Sustancia Coeficiente Estado
Reactivo Copper(II) Sulfate CuSO₄ 1 (aq)
Producto Sodium Sulfate Na₂SO₄ 1 (aq)

Ejemplo cotidiano

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

Importancia industrial

Aplicado en el tratamiento hidrometalúrgico de soluciones de cobre y en el control de efluentes industriales.

Propiedades

Tipo
Double Replacement
Reversible
No
Energía
Exotérmico
ΔH
-84,0 kJ/mol

Reacciones relacionadas

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.