Question

A Metal x is placed in the aqueous solution
of metal y. After some time it is observed
that metal y is deposited on metal x
Which metal is more reactive out of the two​

Answer 1

Explanation:

Aim:

Observing the action of zinc, iron, copper and aluminium metals for the following salt solutions.

Zinc sulphate (ZnSO4)

Copper sulphate (CuSO4)

Ferrous sulphate (FeSO4)

Aluminium sulphate (Al2(SO4)3)

Arranging the metals Zinc, Copper, Iron, and Aluminium in the decreasing order of reactivity based on the results obtained from the above.

Materials required:

Aluminium foil

Zinc granules

Copper turnings

Iron filings

Copper sulphate solution

Aluminium sulphate solution

Zinc sulphate solution

Four 50ml beakers

Test tube

Test tube stand

Theory:

What is reactivity series?

Different metals have different reactivities with chemical reagents. The metals that form positive ions by losing electrons more readily. A more reactive metal displaces a less reactive metal from salt solution. Such reactions are called displacement reactions. Consider an example, if a small amount of zinc is dipped in copper sulphate solution, zinc is displaced from copper sulphate. The blue colour of copper sulphate fades and colourless zinc sulphate solution is obtained. Therefore, zinc is more reactive than copper.

Aluminium has the ability to displace zinc, iron, copper from their respective salt solutions and therefore is more reactive than them.

Reactions:

2Al(s) + 3ZnSO4(aq) –→ Al2(SO4)3 3Zn(s)

2Al(s) + 3FeSO4(aq) –→ Al2(SO4)3 3Fe(s)

2Al(s) + 3CuSO4(aq) –→ Al2(SO4)3 3Cu(s)

Zinc has the ability to displace iron, copper from their respective salt solutions and therefore is more reactive than them.

Reactions:

Zn(s) + CuSO4(aq) –→ ZnSO4 (aq) + Cu(s)

Zn(s) + FeSO4(aq) –→ ZnSO4 (aq) + Fe(s)

Zn(s) + Al2(SO4)3(aq) –→ no reaction

Zn(s) + ZnSO4(aq) –→ no reaction

Iron has the ability to displace copper from its salt solution and therefore is more reactive when compared to Cu.

Reactions:

Fe(s) + CuSO4(aq) –→ FeSO4 (aq) + Cu(s)

Fe(s) + FeSO4(aq) –→ no reaction

Fe(s) + Al2(SO4)3(aq) –→ no reaction

Fe(s) + ZnSO4(aq) –→ no reaction

No reaction occurs when any of the metals from zinc, iron, aluminium, and copper are placed in aqueous solution of Al2(SO4)3.

Therefore, from the above, we can conclude the reactivity of elements in the following order –

Aluminium is more reactive than zinc.

Zinc is more reactive than Fe.

Fe is more reactive than Cu.

Hence, Aluminium is the most reactive and Copper being the least reactive metal.

Answer 2

Answer:

Metal X exists as better reactive than Y since a more reactive metal replaces a less reactive metal from its salt solution. Metal X dissolves and metal Y is deposited.

Explanation:

Metal X exists as better reactive than Y since a more reactive metal replaces a less reactive metal from its salt solution. Metal X dissolves and metal Y is deposited.

Different metals contain different reactivities with chemical reagents. The metals that form positive ions by failing electrons are better readily. A better reactive metal replaces a less reactive metal from the salt solution. Such reactions exist named displacement reactions. Consider an illustration, if a small amount of zinc exists dipped in copper sulfate solution, zinc exists displaced from copper sulfate. The blue color of copper sulfate fades and a colorless zinc sulfate solution exists acquired. Thus, zinc exists better reactive than copper.

Aluminum can displace zinc, iron, and copper from their separate salt solutions and thus exists more reactive than them.

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