Calcium hydroxide + Carbon dioxide → Calcium carbonate + Water

The balanced chemical equation for the following word equation is:

2 {Ca(OH)}_{2} (aq) + {CO}_{2} (g) \to {CaCO}_{3} (aq) + 2 H_{2} O(l)

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2 {Ca(OH)}_{2} (aq) + {CO}_{2} (g) \to 2 {CaCO}_{3} (aq) + 2 H_{2} O(l)

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{Ca(OH)}_{2} (aq) + 2 {CO}_{2} (g) \to 2 {CaCO}_{3} (aq) + H_{2} O(l)

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{Ca(OH)}_{2} (aq) + {CO}_{2} (g) \to {CaCO}_{3} (aq) + H_{2} O (l)

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Solution

The correct option is D ${Ca(OH)}_{2} (aq) + {CO}_{2} (g) \to {CaCO}_{3} (aq) + H_{2} O (l)$
The chemical equation for the given word equation is:

${Ca(OH)}_{2} (aq) + {CO}_{2} (g) \to {CaCO}_{3} (aq) + H_{2} O (aq)$

On counting the number of atoms on both sides, we have:

- The number of calcium atom present on reactant and product side is 1.
- The number of oxygen atoms present on reactant and product side is 4.
- The number of hydrogen atoms present on reactant and product side is 2.
- The number of carbon atoms present on reactant and product side is 1.
Hence, the equation is already balanced.

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Balance the following chemical equation

Calcium hydroxide + carbon dioxide -calcium carbonate + water

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