Preaparing Ag electrode

How to prepare silver chloride electrode

Procedure:

1)	pure $Ag$ wire
2)	surface cleaning in $HNO_3$
3)	oxide removing in concentrated $NH_3$
4)	electroless deposition in mixture of $FeCl_3$ 0.25 mol/l and $HCl$ 0.20 mol/l

Alternatively the $AgCl$ layer can be formed electrochemically in acidic NaCl solution (addition of $HCl$) at low current density (up to 1 A/$dm^2$ ). Higher concentrations of $HCl$ will cause the dissolution of $AgCl$ film.