Question

An iron nail was suspended in a solution of silver nitrate in a test tube.
(a) What type of reaction takes place?
(b) Write the changes you observe in the iron nail and the solution.
(c) Write the equation for chemical reaction that takes place.​

Answer 1

Explanation:

In a beaker filled with silver nitrate solution, dip a new iron nail. Remove the nail after some time. You will observe that the iron nail is coated with silver. This indicates that iron has displaced silver ions from silver nitrate. Hence, iron is more reactive than silver.

Fe+2AgNO3→Fe(NO3)2+2Ag

Answer 2

Explanation:

Fe(s)+CuSO

4

⟶Cu(s)+FeSO

4

When an iron nail is dipped in copper sulphate solution, a brown coating of copper is formed on the surface of iron and the colour of copper sulphate solution changes from blue to light green. This reaction shows that iron is more reactive than copper as it displaces copper from its solution and iron passes into solution as Fe

2+

ions and ferrous sulphate solution is formed.