(a) 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.

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Solution

(a) A chemical equation can be made more informative by:

Indicating physical states of reactants and products.

Indicating heat change in the reaction.

Indicating the reaction condition.

Example:
2KClO₃ (s) + Heat $\overset{{MnO}_{2}}{\to}$ 2KCl (s) + 3O₂ (g)

where,
(s) and (g) signifies solid and gaseous state of compounds, respectively.
Heat written on reactants' side signifies that the reaction consumes heat.
MnO₂ written above right-handed arrow signifies reaction takes place in the presence of MnO₂.

(b) The chemical equation for the given reaction reads as follows:
Ca(OH)₂ (aq) + CO₂ (g) $\to$ CaCO₃ (s) + H₂O (l)

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Similar questions

Write a balanced chemical equation for each of the following :

1. Carbon disulphide burns in air to give carbon dioxide and sulphur dioxide.

2. Calcium hydride reacts with water to form calcium hydroxide and hydrogen gas.

3. Methyl alcohol burns in air to form carbon dioxide and water.

4. Liquid hydrogen peroxide decomposes to give water and oxygen gas.

5. Aluminium hydroxide reacts with sulphuric acid to give ammonium sulphate and water.

6. Aluminium sulphate solution reacts with sodium hydroxide to form a precipitate of aluminium hydroxide.

Balance the following chemical equation

Calcium hydroxide + carbon dioxide -calcium carbonate + water

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