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Chapter 8: Problem 83

When carbon dioxide is bubbled through a clear calcium hydroxide solution, the solution becomes milky. Write an equation for the reaction and explain how this reaction illustrates that \(\mathrm{CO}_{2}\) is an acidic oxide.

Short Answer

Expert verified
The chemical equation for the reaction is \(\mathrm{CO}_{2}\) (g) + \(\mathrm{Ca(OH)}_{2}\) (aq) -> \(\mathrm{CaCO}_{3}\) (s) + \(\mathrm{H}_{2}\)\(\mathrm{O}\) (l). The milky solution is due to the formation of calcium carbonate, a white insoluble solid. Carbon dioxide is an acidic oxide as it reacts with water to form an acid and with bases to form a salt and water.

Step by step solution

01

Writing the balanced chemical equation

The given reaction can be written as follows: \[\mathrm{CO}_{2}\] (g) + \[\mathrm{Ca(OH)}_{2}\] (aq) -> \[\mathrm{CaCO}_{3}\] (s) + \[\mathrm{H}_{2}\]\[\mathrm{O}\] (l) The balanced chemical reaction indicates that one mole of carbon dioxide reacts with one mole of calcium hydroxide to produce one mole of calcium carbonate and one mole of water.
02

Identifying the resulting compound

The milky appearance of the solution is due to the formation of \[\mathrm{CaCO}_{3}\], calcium carbonate, which is insoluble in water and exists as a white solid.
03

Explaining how \(\mathrm{CO}_{2}\) is an acidic oxide

The reaction is essentially a neutralization reaction, where an acid (carbon dioxide) reacts with a base (calcium hydroxide) to form a salt (calcium carbonate) and water. Carbon dioxide is considered an acidic oxide because it reacts with water to form carbonic acid, and it reacts with bases to form a salt and water, as demonstrated by the given reaction.

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