Question

Neha prepared a blue coloured solution of copper sulphate in a beaker and placed an iron nail in it.
15 marks
(i)Describe in words the changes that will be observed in the beaker after about an
hour Explain why this happens.
(ii) Write the word equation for the reaction observed in the beaker
(iii) Name one metal that is more reactive than both iron and copper
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Answer 1

Answer:

I) Displacement reaction will take place in the above reaction. This is because iron ( high reactive element) will displace copper ( low reactive element) and make a compound iron sulphate.

2) CuSo4+ Fe---------- FeSo4 + Cu

3) Sodium ( Na) is more reactive.

Answer 2

Answer:

i) the copper sulphate solution change its colour from blue to green when it react with an iron and the iron have a coating of reddish brown.

ii) Fe(s) + CuSO4(aq) FeSO4(aq) + Cu(s)

iii) Zinc (Zn) and Potassium (K)