Raju dropped an iron nail in Copper Sulphate solution and observed a colour change in original solution. What could be the reason for this? If you drop the same iron nail in ZnSo4 solution, will you find any colour change? Justify your statement and write suitable reactions for both
statements
Answers
Answer:
The colour will change in the 1st solution but not in the 2nd solution.
Explanation:
When iron nail is dropped in copper sulphate solution (CuSO4) , the colour changes from blue to green because:
Fe + CuSO4 ---> FeSO4 + Cu
This happens because Fe or Iron is more reactive that copper thus it displaces it. This reaction is known as displacement reaction.
In the 2nd Case:
No reaction takes place. Displacement doesn't take place as Iron is not more reactive than Zinc as given in the reactivity series. Thus Solved.
Fe + ZnSO4 doesn't take place.
Answer:
1st experiment: colour will change green from blue as ...Copper sulphate solution is blue in colour and Iron sulphate is green in colour ..this changes happened because of displacement reaction ..in displacement reaction a more reactive metal displaces a less reactive metal from its salt solution .
In the second experiment there will be no such colour change because Zinc is more reactive than iron ..and we know that as iron is less reactive so it won't be able to displace zinc from its salt so there will be no colour change
Explanation:
1. CuSo4 +Fe ---- FeSo4 +Cu
2. ZnSo4 + Fe ----- ZnSo4 + Fe