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ICSE Class 10 Chemistry Question 23 of 23

Solved Sample Paper 2 — Question 23

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Question

Question 8(iii)

Write the steps required to convert hydrogen chloride to anhydrous iron (III) chloride. Also, write the equations for the reactions.

Answer

The steps required to convert hydrogen chloride to anhydrous iron (III) chloride are:

  1. Prepare chlorine by reacting oxidising agents (like MnO2, PbO2, Pb3O4) with conc. HCl.
    MnO2 + 4HCl (conc.) ⟶ MnCl2 + Cl2 +2H2O
  2. Now, pass the chlorine (prepared) over conc. H2SO4 for drying.
  3. Then the dry chlorine is heated over with iron to give anhydrous iron (III) chloride FeCl3.
    2Fe + 3Cl2 ⟶ 2FeCl3