Question

Arrange the metals iron, magnesium, zinc and copper in the increasing order of their reactivity. What will be the two observations by you when iron filings are added to copper sulphate solution?

Answer 1

Magnesium

Zinc

Iron

Copper

OBSERVATIONS-

1. Green colour of solution because of FeSO4

2. Deposition of copper on iron fillings so iron fillings will be of brown colour.

Answer 2

Answer:

Here are the four metals arranged in order of increasing reactivity:

Cu - Copper

Fe - Iron

Zn - Zinc

Mg - Magnesium

The iron displaces the copper in in the copper sulphate solution to form a green solution and deposits of brown copper metal.

Explanation:

Here is The List of The Reactivity series of metals:

K - Potassium

Na - Sodium

Ca - Calcium

Mg - Magnesium

Al - Aluminium

Zn - Zinc

Fe - Iron

Sn - Tin

Pb - Lead

Cu - Copper

Hg - Mercury

Ag - Silver

Au - Gold

The iron fillings when placed in the copper sulphate solution, displaces copper in the solution beacuse iron is more reactive than copper.

Iron metal is found higher than copper in the reactivity series and thus it is more reactive than copper metal.

A metal that is more reactive will displace a less reactive metal in a solution of a compound formed with the less reactive metal.

Here is the balance equation for the reaction:

Copper(II)Sulfate(aq) + Iron(s) =  Iron(II)Sulfate(aq) + Copper(s)

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