Question

when SO₃ is disolved in water , acid rain is formed . the rain slowly damages marble statues. what is the acid prersent in the rain? write the chemical equations involved in the reaction in the balanced form.

Answer 1

It is SO₂ which dissolves in water that leads to acid rain. It reacts with water to form sulphurous acid.

SO₂ + H₂O ---------> H₂SO₃
Also , NO₂ dissolves in water to form nitric acid which leads to acid rain.


Marble stone majorly contains Calcium carbonate, which reacts with the acid rain water as follows:

CaCO₃ + H₂SO₄ --------> CaSO₄ + H₂O + CO₂

Thus the marble statues are damaged.