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ICSE Class 10 Chemistry Question 12 of 28

Acids, Bases and Salts — Question 27

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Question

Question 27

Give balanced equations for the decomposition of

  1. calcium bicarbonate by dil. HCl
  2. calcium carbonate by dil. HNO3
  3. sodium sulphite by dil. H2SO4
  4. zinc sulphide by dil. H2SO4.
Answer
  1. Decomposition of calcium bicarbonate by dil. HCl
    Ca(HCO3)2 + 2HCl ⟶ CaCl2 + 2H2O+ 2CO2
  2. Decomposition of calcium carbonate by dil. HNO3
    CaCO3 + 2HNO3 ⟶ Ca(NO3)2 + H2O+ CO2
  3. Decomposition of sodium sulphite by dil. H2SO4
    Na2SO3 + H2SO4 (dil.) ⟶ Na2SO4 + H2O + SO2
  4. Decomposition of zinc sulphide by dil. H2SO4
    ZnS + H2SO4 ⟶ ZnSO4 + H2S