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Home/ Questions/Q 206
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Gurpreet Kaur
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Gurpreet Kaur
Asked: November 26, 20192019-11-26T15:27:30+00:00 2019-11-26T15:27:30+00:00In: Class 10

Why does the colour of copper sulphate solution change when an iron nail is dipped in it?

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10 sciencechemical reactions and equationschemistryclass 10ncert solutions
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      Adhilsha A
      2019-11-28T16:51:10+00:00Added an answer on November 28, 2019 at 4:51 pm

      Iron is more reactive than copper. So iron nail replaces copper from copper solution. Thus copper solution loses it’s characteristic colour.

      CuSO4 + Fe –> FeSO4 + Cu

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    2. manan
      2019-11-27T16:34:31+00:00Added an answer on November 27, 2019 at 4:34 pm

      When an iron nail dipped in the copper sulphate solution than iron displaces copper from the copper sulphate because iron is more reactive than copper. Therefore the colour of the copper sulphate solution changes.

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    3. Tulika
      2021-02-08T06:26:56+00:00Added an answer on February 8, 2021 at 6:26 am

      The colour of copper sulphate solution is blue. When an iron nail is dipped in the solution of copper sulphate, it forms ferrous sulphate solution and copper metal by the displacement of copper from the solution.
      The colour of ferrous sulphate is green. That’s why the solution becomes green.

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