Potassium cyanide (KCN) was a crucial supply of alkali metallic cyanides prior to the invention in the Castner procedure. It was produced by the decomposition of potassium ferrocyanide. The reaction is as follows: KCN is used being a photographic fixer during the damp plate collodion process.The KCN dissolves silver where https://rowangvtir.getblogs.net/62869622/how-much-you-need-to-expect-you-ll-pay-for-a-good-potassium-cyanide-acid-or-base