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JAMB Chemistry 1985 Question 34

Question 34

Qualitative Analysis

Tetraoxosulphate (VI) ions are finally tested using

  1. A.acidified silver nitrate
  2. B.acidified barium chloride
  3. C.lime-water
  4. D.dilute hydrochloric acid
  5. E.acidified lead nitrate
Show the answer and explanation

Answer: B (acidified barium chloride)

Explanation

Adding barium chloride acidified with dilute HCl to a sulphate solution gives a white precipitate of barium sulphate that does not dissolve in the acid.