Question

Write the word equation and the chemical equation and also state the kind of change when an iron nail is kept immersed in a copper sulphate solution.

Answer 1

Hint: Word equation means we have to write the chemical reaction in the form of words. Chemical reaction means we have to mention the chemical symbols of the elements to represent the reaction. Nail contains iron in it. The molecular formula of copper sulphate is $CuS{O}_4$.

Complete step by step solution:
-In the question, it is given that iron nails are dipped or immersed in a copper sulphate solution.
-When a nail contains iron metal is dipped in copper sulphate then the iron displaces the copper from copper sulphate and forms ferrous sulphate.
-The reaction in the form of the word equation is as follows.
Iron + Copper sulphate $\to$ Iron sulphate or ferrous sulphate + Copper.
-The displacement reaction in the form of the chemical reaction is as follows.
$$Fe+CuS{O}_4\to FeS{O}_4+Cu$$
-In the above reaction iron reacts with copper sulphate and forms ferrous sulphate and copper metal.
-The kind of change that we can observe during the immersion of an iron nail in copper sulphate solution is a chemical change.

Note: If a change happens by physically (means the composition of the chemical should not change) then it is called a physical change. If a change happens chemically means the composition of the chemical changes then it is called a chemical change. In a physical change, the damage occurs physically but in a chemical change, the composition (chemical constituents) is going to change.