(Note: The above method of balancing is called trial and error method
only. Sometimes you may have to take more care to balance the equation.)
Making Chemical Equations more informative:
Chemical equations can be made more informative by expressing
following characteristics of the reactants and products.
i. Physical state
ii. Heat changes (exothermic or endothermic change)
iii.Gas evolved (if any)
iv. Precipitate formed (if any)
i. Expressing the physical state: To make the chemical equation
more informative, the physical states of the substances may be mentioned
along with their chemical formulae. The different states ie., gaseous, liquid,
and solid states are represented by the notations (g), (l) and (s) respectively.
If the substance is present as a solution in water, the word ‘aqueous’ is
written. In the short form it is written as (aq).
The balanced equation(16) is written along with the physical states as:
