how will you prove experimentally that products of respiration in our body are a carbon dioxide
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Take quick lime (CaO) in a beaker and add water to it.
Close the beaker so that it does not react with air.
Take a pipe and blow the air through the pipe to the slaked lime solution ( Ca(OH)₂ )
After some time you can see that there is a white precipitate formed in with beaker with water.
This indicated that CO₂ is the main constituent given out during respiration.
This can be given as an equation:
Ca(OH)₂ + CO₂ -------->CaCO₃ + H2O
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