What happens when carbon dioxide gas is passed through lime water:

(i) for a short time?

(ii) for a considerable long time?

Write equations of the reactions involved.

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Solution

When $C O_{2}$ is passed through lime water,
(i) for a short interval of time: lime water turns milky due to the formation of white precipitate of $C a C O_{3}$ .

$C a (O H)_{2} (a q) + C O_{2} (g) ⟶ C a C O_{3} (s) + H_{2} O (l)$

(ii) for a considerable long time: $C a C O_{3}$ reacts with $C O_{2}$ to form $C a (H C O_{3})_{2}$ which is soluble in water. The milkiness disappears.

$C a C O_{3} (s) + C O_{2} (g) + H_{2} O (l) ⟶ C a (H C O_{3})_{2} (a q)$

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Similar questions

(a) What happens when an acid reacts with a metal carbonate? Explain with the help of an example. Write chemical equation of the reaction involved.

(b) What happens when carbon dioxide gas is passed through lime water :

(i) for a short time?

(ii) for a considerable time?

Write equations of the reactions involved.

What happens when ${CO}_{2}$ gas is passed through lime water for a long time?

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