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Question

Give one chemical test to distinguish between the following pairs of compounds.

Iron (II) chloride solution and Iron (III) chloride solution.


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Solution

Iron (II) chloride

Iron (II) chloride

  • We will add sodium hydroxide to the given solution.
  • Dirty green precipitate is formed.
  • We will add sodium hydroxide to the above solution.
  • Reddish-brown precipitate is observed.
FeCl2+2NaOH2NaCl+Fe(OH)2FeCl3+3NaOH3NaCl+Fe(OH)3

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