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Question
What are the ways by which a chemical equation can be made more informative ?
Solution
A chemical equation can give more information in the following ways:
- The physical state of the reactants and products can be indicated by putting (s) for solid, (l) for liquid, (g) for gas and (aq) for aqueous state.
- Evolution or absorption 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 arrow (→ or =) separating the reactants and products.
- Concentration of reactants and products is indicated by adding word (dil) for dilute and (conc) for concentrated before their formulae.
- By the sign \[\ce{-> or <=>}\] information about irreversible and reversible reactions can be obtained.
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