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Question

State one relevant observation for each of the following reaction.

Action of dilute Hydrochloric acid on Iron (II) sulphide.


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Solution

  • Dilute Hydrochloric acid (HCl) when added to metal sulphide it forms their metal chloride and liberate Hydrogen sulphide (H2S)gas with rotten egg smell.
  • General reaction of metal sulphides with dilute hydrogen chloride is Metal+HydrochloricMetal+HydrogenSulphideacidchloridesulphide
  • Reaction between Iron(II) sulphide (FeS) and Hydrochloric acid is FeS(s)+2HCl(aq)FeCl2(aq)+H2S(g)Iron(II)HydrochloricIron(II)Hydrogensulphideacidchloridesulphide
  • Therefore, a gas with rotten smell (H2S) is observed.

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