Barium carbonate is commercially important as a basis for the manufacture of other barium compounds. In its manufacture, barium sulfide is first prepared by heating the natural sulfate, barytes with carbon. The barium sulfide is extracted from this mass with water and the solution treated with sodium carbonate to precipitate the carbonate of barium. In the operation of such a process it is found that the solution of barium sulfide formed contains also some calcium sulfide, originating from impurities in the barytes. The solution is treated with sodium carbonate, and the precipitated mass of calcium and barium carbonates is filtered off. It is found that 16.45 kg of dry precipitate are removed from each 100 kg of filtrate collected. The analysis of the precipitate is: 9.9% CaCO; and 90.1% BaCO3. The analysis of the filtrate is 6.85% Na,S, 2.25% Na2CO; and 90.9% H2O. The sodium carbonate for precipitation was added in the form of anhydrous soda ash which contained CaCO3 as an impurity. Calculate:

Barium carbonate is commercially important as a basis for the manufacture of other barium compounds. In its manufacture, barium sulfide is first prepared by heating the natural sulfate, barytes with carbon. The barium sulfide is extracted from this mass with water and the solution treated with sodium carbonate to precipitate the carbonate of barium. In the operation of such a process it is found that the solution of barium sulfide formed contains also some calcium sulfide, originating from impurities in the barytes. The solution is treated with sodium carbonate, and the precipitated mass of calcium and barium carbonates is filtered off. It is found that 16.45 kg of dry precipitate are removed from each 100 kg of filtrate collected. The analysis of the precipitate is: 9.9% CaCO; and 90.1% BaCO3. The analysis of the filtrate is 6.85% Na,S, 2.25% Na2CO; and 90.9% H2O. The sodium carbonate for precipitation was added in the form of anhydrous soda ash which contained CaCO3 as an impurity. Calculate:

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter15: Acid–base Equilibria

Section: Chapter Questions

Problem 98AP

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