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JAMB Chemistry 1992 Question 20

Question 20

Acids, Bases and Salts

Which of these is an acid salt?

  1. A.K2SO4.Al2(SO4)3.24H2O
  2. B.CuCO3.Cu(OH)2
  3. C.NaHS
  4. D.CaOCl2.
Show the answer and explanation

Answer: C (NaHS)

Explanation

An acid salt still has a replaceable hydrogen from the acid. NaHS comes from H2S with only one H replaced. Alum is a double salt and CuCO3.Cu(OH)2 is a basic salt.