Question

On electroplating an article with silver we use sodium argentocyanide or potassium argentocyanide instead of silver nitrate as the deposition of silver is very fast andhence not smooth and uniform.How

Answer 1

Silver nitrate being an ionic compound dissociates very fast than sodium argentocyanide or potassium argentocyanide as they are complex molecules.It is easy to separate silver nitrate than to separate sodium argentocyanide or potassium argentocyanide.

AgNO3 -----> Ag + NO3
Na[Ag(CN)2] Na + Ag + 2CN