What are the various ways in which a chemical equation can be made more informative? Give examples to illustrate your answer. (b) Write balanced chemical equation from the following information: An aqueous calcium hydroxide solution (lime water) reacts with carbon dioxide gas to produce a solid calcium carbonate precipitate and water.

(a) Ca(OH)2 (aq)+ CO2 (g)---3000°C →CaCO3(s)+H2O(l) A chemical equation can be informative by 1) The chemical states is indicated by (s) for solids, (l) for liquids and (g) for gases and (aq) for aqueous solution 2) Temperature written on the above of arrow 3) Arrow upwards shows compound or any gas formed escaped or liberated 4) Arrow downwards shows precipitated 5) Heat is written on reactant side to indicate exothermic and when on written product side it will be endothermic b) Ca(OH)2 (aq) + CO2 (g) → CaCO3 (s) + H2O (l)