Question

zinc in the extraction of silver

Answer 1

Silver is extracted from the ore-argentite (Ag2S). The process of extraction of silver is called as cyanide process or heap leach process. The ore is crushed, concentrated and then treated with sodium cyanide solution. This reaction forms sodium argento cyanide.

Zinc dust is used precipitate silver metal from sodium argento cyanide.The solution of sodium argento cyanide combines with zinc dust and forms sodium tetra cyanozicate and silver metal.