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UPSC Combined Geo-Scientist

Chemist

  • 3 descriptive papers
  • 200 marks each
  • 3 h per paper

Mains Paper III covers analytical and organic chemistry.

UPSC Combined Geo-Scientist, Mains · 2016 · Mains Paper III

Q2(c). Hydrated salt mixture

Question

A mixture of BaCl₂·2H₂O (244.26) and KCl (74.55) weighs 1.783 g before and 1.5623 g after dehydration at 160°C. Find mass percentages of Ba, K and Cl.

Answer in brief

Ba = 47.18%, K = 8.44%, Cl = 32.01% in the original mixture.

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CoversHydrated salt mixtureGravimetric calculation

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