Explain Carius method and its principal for estimation of halogen elem

1.	Explain Carius method and its principal for estimation of halogen elements
Answer» Solution :Procedure: A known mass of an organic compound is heated with fuming nitric acid in presence of silver nitrate contained in a hard glass TUBE known as caring tube in a furance. Principle: Carbon adn hydrogen present in organic compound are oxidised to carbon dioxide and water. The halogen present FORMS the corresponding silver halide (Ag X). It is filtered, dried and weighed. `AgNO_(3) + X underset(Delta)overset(HNO_(3))rarr AgX_((s))` mass of organic compound = mg 1 mol of AgX CONTAINS 1 mol of X. `therefore` mass of halogen in `m_(1)` g of AgX is, mass of halogen `= ("atomic mass of " xx X m_(1))/("molecular mass of AgX")` `therefore` of halogen `= (("atomic mass of X") (m_(1)) (100))/(("molecular mass of AgX")(m))`

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