Question

what is extraction of halogen by carius method

Answer 1

The Carius halogen method in analytical chemistry is a method for quantitative determination of halogen in chemical substances. A known mass of an organic compound is heated with fuming nitric acid in the presence of silver nitrate contained in a hard glass tube known as various tube, in a furnace. Carnbon and hydrogen present in the compound are oxidized to carbon dioxide and water. The halogen present forms the corresponding silver halide (AgX). It is filtered, washed, dried and weighed. This chemical test work equally well for the determination of sulphur but without addition of silver nitrate. The sulfuric acid intermediate formed after reaction of sulphur with fuming nitric acid forms insoluble barium sulphate in addition of barium chloride.