Question

Explain,with example, How the physical states of the reactants and products can be shown in a chemical equation

Answer 1

The physical state of the reactants and products in a chemical reaction can be indicated in the round bracket after the chemical formula of the substance, whether it is aqueous or gaseous or solid or liquid.

Let’s consider an example. When aqueous calcium hydroxide reacts with carbon dioxide, calcium carbonate is formed which is in solid state along with water.

This can be written as

Ca(OH)2 (aq)+CO2→CaCO3 (S)+H2O (l).

Answer 2

Answer:

Explanation:

2H2+O2-2H2O