Question

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Answer 1

$\huge \mathcal{ \: \: \: \: \: BIOLOGY}$

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ACTIVITY :-

The following diagrams show the test for Carbon Dioxide. Carbon Dioxide will turn limewater (calcium hydroxide) cloudy. Scroll down the for examples and explanations.

Limewater Test - To check for carbon dioxide in your breath Lime Water Breath Experiment

Using lime water is a fun and easy way to test for the presence of carbon dioxide. The exhaled carbon dioxide is used to produce a precipitate of calcium carbonate with the lime water.carbon dioxide + calcium hydroxide (limewater) → calcium carbonate + water

Procedure:

1) Add 50 ml of lime water to two 100 ml beakers.

2) Bubble room air through one beaker for one minute using a pipette and Bubble room air through one beaker for one minute using a pipette and pipette pump. Observe and record the results.

3) With the other beaker, bubble exhaled air through the solution for 1 minute. Try to bubble the air through the same rate that you did with the first beaker. After 1 minute record your results.

Limewater & CO²

Carbon dioxide dissolves in water to form carbonic acid (H2CO3).Lime water is a solution of calcium hydroxide (Ca(OH)2). They react to form calcium carbonate (CaCO3) and water. Calcium carbonate is insoluble and forms a white precipitate. If CO2 continues to be passed, more carbonic acid forms, which then reacts with the calcium carbonate to form calcium hydrogen

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