Question

how the lime water dissolves in water I want the deep proof of this experiment​

Answer 1

Answer:

Carbon dioxide, also commonly known by its chemical formula CO2, is one of the major building blocks of life. It is usually found in its gaseous form, and is a major part of the plant and animal life cycle. CO2 is consumed by plants in photosynthesis and is produced by animals (like us!) during respiration. It is also expelled from the earth’s core during volcanic eruptions and exits a vehicle’s engine from its tailpipe when the motor is running. It’s considered a greenhouse gas, one of several compounds which contributes to global climate change. Carbon dioxide is all around us, and this simple experiment will help you see CO2 production by conducting a carbon dioxide test with two chemical reactions.

Answer 2

Answer:

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 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.  

Show Step-by-step Solutions

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 carbonate, which is soluble, so the precipitate is seen to dissolve.

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