Silver Chloride Precipitation

AgNO3 + NaCl → AgCl↓ + NaNO3

Übersicht

Silver nitrate reacts with sodium chloride to form a white curdy precipitate of silver chloride. AgCl has a very low Ksp of 1.8 × 10⁻¹⁰, making it essentially insoluble. The precipitate turns purple in light due to photodecomposition of AgCl to silver metal and chlorine. This is the basis of the chloride ion test.

Teilnehmer

Rolle Substanz Koeffizient Zustand
Reaktant Silver Nitrate AgNO₃ 1 (aq)
Reaktant Sodium Chloride NaCl 1 (aq)
Produkt Silver Chloride AgCl 1 (s)
Produkt Sodium Nitrate NaNO₃ 1 (aq)

Alltägliches Beispiel

The silver chloride test for chloride ions in water is one of the first qualitative analysis tests taught in chemistry courses.

Industrielle Bedeutung

AgCl precipitation is used in water quality testing, photography (historical), and in the preparation of silver chloride electrodes for electrochemistry.

Eigenschaften

Typ
Precipitation
Reversibel
Nein
Energie
Exotherm
ΔH
-65,5 kJ/mol

Verwandte Reaktionen

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 Silver Chloride Precipitation?
The balanced equation is: AgNO₃ + NaCl → AgCl↓ + NaNO₃.
What type of reaction is Silver Chloride Precipitation?
Silver Chloride Precipitation is a precipitation reaction.
Is Silver Chloride Precipitation exothermic or endothermic?
Silver Chloride Precipitation is exothermic (releases energy). The enthalpy change (ΔH) is -65.5 kJ/mol.