Question

What are the ways by which a chemical equation can be made more informative?

Answer 1

A chemical equation can be made more informative in the following ways:

• The physical state of each reactant and product can be shown by letters in brackets (s) for solid, (l) for liquid, (g) for gas and (aq) for the aqueous state.
• Evolution or addition of heat during the reaction can be denoted by adding or subtracting a
  heat term on the product side.
• Temperature, pressure, and catalyst can be indicated above the arrown separating the
  reactants and products.
• The concentration of reactants and products is indicated by adding the word (dil) for dilute and (cone)
  for concentrated before their formulae.
• By the sign $\to$ information about irreversible and $\rightleftharpoons$ reversible reactions can be obtained.