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Question

How is Sulfur estimated by Carius method?


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Solution

To estimate Sulfur by Carius method:

  • Sulfur is mostly found as Sulphide and Sulphate minerals. It can be estimated by the Carius method. Carius method is used for quantitative analysis of Sulfur.
  • In this test, a known mass of sulphur present in an organic compound with Silver Nitrate is heated into a sealed tube known as carius tube with silver.
  • The organic compound is then converted to Sulphuric acid which then reacts with excess Barium Chloride solution and produces a precipitate of Barium Sulphate. The precipitate formed is then dried, and weighed. In this way, Sulfur is estimated.

Thus, The precipitate formed led to the estimation of sulphur by the Carius method.


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