Question

A student placed an iron nail in copper sulphate solution. He observed the reddish brown coating on the iron nail which is

Answer 1

Answer:

The student observes a reddish brown coating on the iron nail which is smooth and shining.

Explanation:

Concept,

• When an iron nail is dipped into the copper sulfate solution, the iron will displace the copper from the copper sulfate solution since the iron is more reactive than the copper.  
• Hence, the color of the copper sulfate solution changes from blue to pale green.

              CuSO₄ + Fe → FeSO₄ + Cu

• The reaction shows that iron is more reactive than copper because it displaces copper from the copper sulfate solution.  
• The Iron dissolves as Fe(II) and forms the iron sulfate solution.

Conclusion,

Therefore, the student observes a reddish brown coating on the iron nail which is smooth and shining.

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Answer 2

Answer:

Students observed the reddish brown coating on the iron nail which is smooth and shiny .

Explanation:

Concept:

When a copper sulphate solution is applied to an iron nail, the iron will displace the copper from the solution because the iron is

greater reactivity than copper. As a result, the copper sulphate solution turns from blue to a light green tint.

FeSO4 + Cu → CuSO4

Because iron removes copper from the copper sulphate solution, the reaction demonstrates that iron is more reactive than copper.

To create the iron sulphate solution, the iron dissolves as Fe(II).

Conclusion:

As a result, the learner notices a smooth, shiny reddish brown coating on the iron nail.

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