What are the drawbacks of a chemical equation ? Illustrate with an example.

Explanation

Let us consider the following reaction:
`2H_2S + SO_2 to 3S + 2H_2O`
This is a balanced chemical equation but it does give the following information :
(i) The physical state of the reactants and produc whether these are solids, liquids or gaseous, etc.
(ii) Concentration of reactants and products.
(iii) Conditions of reaction such as temperature pressure, catalyst and light.
(iv) The rate of reaction - whether it is slow or fast. (v). Time taken for completion.
(vi) Heat changes - whether heat is evolved absorbed.
(vii) Whether reaction is reversible or irreversible.