Why does the blue colour of copper sulphate fades away when an iron nail is dipped in it? Explain with chemical reaction.
Why does the blue colour of copper sulphate fades away when an iron nail is dipped in it? Explain with chemical reaction.
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Answer:
When an iron nail immersed in the solution of copper sulphate than iron displaces copper from the solution of copper sulphate because iron is more reactive than copper. Therefore copper sulphate solution colour changes from blue to pale green.
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Answer:
When an iron nail immersed in the solution of copper sulphate than iron displaces copper from the solution of copper sulphate because iron is more reactive than copper. Therefore copper sulphate solution colour changes from blue to pale green
CuSO4 (aq) + Fe (s) → FeSO4 (aq) + Cu (s)
In this reaction following two processes take place:
Cu²⁺ + 2e = Cu⁰ (reduction process, Cu²⁺ is the oxidizing agent)
Fe⁰ – 2e = Fe²⁺ (oxidation process, Fe⁰ is the reducing agent)