Question

What happens to lime water, when we exhale air into it? ( )
a). Remains same b). Turns blue c). Turns milky d). Becomes colorless

Answer 1

Answer:

When exhaled air is blown through Lime Water which is also known as calcium hydroxide, the carbon dioxide present in the exhaled air reacts with the Lime water and turns it into a milky solution, since the the CO2 reacts with Ca(OH)2 and forms CaCO3 or Calcium Carbonate, which is insoluble and white in colour.

Explanation:

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Answer 2

Answer:

Turns milky

Explanation:

Lime water, also called calcium hydroxide, is a solution of calcium oxide in water. It is represented by the formula Ca(OH)2. The air we exhale is primarily carbon dioxide (CO2). Calcium hydroxide is a clear solution. It reacts with carbon dioxide present in the exhaled air and turns milky due to the formation of calcium carbonate. Calcium carbonate gradually precipitates out.

The reaction for the discussed chemical process is written below:

       Ca(OH)2(aq) + CO2(g) → CaCO3(s) + H2O(l)