Question

32. Write chemical equations for the following reactions:

a. Reaction of aluminum with hydrochloric acid

b. Reaction of zinc with sulphuric acid

c. Reaction of zinc with copper sulphate​

Answer 1

Answer:

Aluminum reacts with diluted hydrochloric acid at room temperature. The metal aluminium dissolves in hydrochloric acid, producing aluminum chloride and colorless hydrogen gas. The reaction taking place between aluminium and hydrochloric acid is irreversible. And the final products will not react with each other.

b.Zinc is more reactive than hydrogen and it displaces hydrogen from dilute acids. Zinc reacts with dilute sulphuric acid to form zinc sulphate and hydrogen gas is evolved. This is a single displacement reaction of a non-metal by a metal. ... So, this reaction is a chemical change.

c.When zinc is added to copper sulphate (CUSO4) solution due to more reactivity of zinc, cooper is replaced by the zinc and forms zinc sulphate. During the process, the colour of the solution changes from blue to colourless.

Answer 2

Explanation:

a. 2Al+6HCl ---- 2AlCl3+3H2