Question

Hard question,!

Study the following reactions and explain their reactivity. Arrange Cu, Fe, Zn and Ag in increasing order of their reactivity.

a. CuSO4 + Fe ---> FeSO4 + Cu
b. FeSO4 + Zn ---> ZnSO4 + Fe
c. 2AgNO3 + Cu ---> Cu(NO3)2 + 2Ag

Answer fast!​

Answer 1

$\huge\rm{Answer:-}$

● Reaction 1 :-

$\bold{CuSO_4+Fe----)FeSO_4+Cu}$

In this, reaction Fe (iron) displaced Cu (copper) from its salt. Hence, Fe is more reactive than Cu. i.e., Cu < Fe

● Reaction 2 :-

$\bold{FeSO_4+Zn----)ZnSO_4+Fe}$

In this reaction, Zn (zinc) displaced Fe (iron) from its salt. Hence, Zn is more reactive than Fe. i.e., Fe < Zn

● Reaction 3 :-

$\bold{2AgNO_3+Cu----)Cu(NO_3)_2+2Ag}$

In this reaction, Cu (copper) displaced Ag (silver) from its salt. Hence, Cu is more reactive than Ag. i.e., Ag < Cu

( NOTE : All of the above reactions are displacement reactions because an element displaces/replaces another element in a compound. )

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So, the increasing order of their reactivity will be :-

Ag < Cu < Fe < Zn

Hence, from the reactivity series it is clear that zinc (Zn) is the most reactive metal while silver (Ag) is the least reactive metal.

Answer 2

Explanation:

● Reaction 1 :-

{CuSO_4+Fe----)FeSO_4+Cu}CuSO

4

+Fe−−−−)FeSO

4

+Cu

In this, reaction Fe (iron) displaced Cu (copper) from its salt. Hence, Fe is more reactive than Cu. i.e., Cu < Fe

● Reaction 2 :-

\bold{FeSO_4+Zn----)ZnSO_4+Fe}FeSO

4

+Zn−−−−)ZnSO

4

+Fe

In this reaction, Zn (zinc) displaced Fe (iron) from its salt. Hence, Zn is more reactive than Fe. i.e., Fe < Zn

● Reaction 3 :-

\bold{2AgNO_3+Cu----)Cu(NO_3)_2+2Ag}2AgNO

3

+Cu−−−−)Cu(NO

3

)

2

+2Ag

In this reaction, Cu (copper) displaced Ag (silver) from its salt. Hence, Cu is more reactive than Ag. i.e., Ag < Cu

( NOTE : All of the above reactions are displacement reactions because an element displaces/replaces another element in a compound. )

So, the increasing order of their reactivity will be :-

Ag < Cu < Fe < Zn

Hence, from the reactivity series it is clear that zinc (Zn) is the most reactive metal while silver (Ag) is the least reactive metal.