passwella.
Menu

JAMB Chemistry 1994 Question 36

Question 36

Qualitative Analysis

Which of these solutions will give a white precipitate with a solution of barium chloride acidified with hydrochloric acid?

  1. A.Sodium trioxocarbonate (IV)
  2. B.Sodium tetraoxosulphate (VI)
  3. C.Sodium trioxosulphate (IV)
  4. D.Sodium sulphide
Show the answer and explanation

Answer: B (Sodium tetraoxosulphate (VI))

Explanation

Sulphate ions form white BaSO4, which does not dissolve in acid. The acid stops carbonates and sulphites from giving a precipitate.