what is the purpose of caustic soda for the experiment to prove carbon dioxide is released in respiration of green plants
Answers
The solution is known to absorb carbon dioxide that is released during the process of respiration of germinating seeds, thereby creating a slight vacuum in the flask hence increase in the water level.
Answer:
The conical flask is fitted to a delivery tube bent twice at right angles by means of cork.
Suspend a small test tube containing 20% potassium hydroxide.
Dip the free end of the bent tube in a beaker of coloured water.
Leave it for a day. Note the changes.
The germinating seeds respires aerobically by utilizing the oxygen in the flask.
Carbon dioxide released during the aerobic respiration is absorbed by potassium hydroxide and creates a vacuum and causes rise of water in the bent tube.
If we put a burning candle in the setup, the candle extinguishes which proves oxygen is utilized by germinating seed for respiration.
Explanation:
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