Silver Chloride (AgCl)



It occurs in nature as horn silver as ore.

 

Preparation

Agcl is obtained by adding any soluble chloride to silver nitrate solution.

AgNO3 + KCl            →             AgCl   + KNO3

White ppt

The ppt is washed, collected and then dried.

 

Properties

 

It is white amorphous solid insoluble in water.

AgCl is light sensitive compound and turns violet and finally to black on exposure to light.

 

Action of NH3 solution

AgCl dissolves in NH3 solution by forming a soluble diamine complex.

AgCl + NH4OH             →         [Ag (NH3)2] (1 + 2H2O)

di-amine silver (I) chloride.

(soluble complex compound)

Action of KCN solution:

Agcl dissolves in KCN solution forming a soluble potassium argento cyanide complex.

Agcl + KCN                →           K [Ag (CN)2]  + KCl

Potassium argento cyanide

Uses

AgCl is used in making photographic film and paper.