Question

What are the various ways in which a chemical equation can be more can be made more informative give example to illustrate your answer?

Answer 1

1) by indicating the physical state of reactants and products.
Eg.
2Na(s) + 2H2O (l) → 2NaOH (aq) + H2 (g)

2) by indicating reaction conditions.
Eg.
nitrogen and hydrogen react to form ammonia under the condition; temperature =450°C, pressure =200-900 atm, and in the presence of a catalyst.

3)by indicating heat absorbed/evolved
Eg. Exothermic reaction,
C(s) + O2 (g) → CO2 (g) + Heat

4)by indicating concentrations (dil./conc.) of reactants and products
Eg.
Zn(s) + dil. H2SO4(aq) → ZnSO4(aq) + H2(g)

5)by indicating rate of reaction (fast/slow)
Eg.
HCl (aq) + NaOH(aq) fast NaCl(aq) + H2O(l)