Question

A student conducted an activity to show that co2 is released during respiration. List two precautions

Answer 1

the rise in level of water in the delivery tube indirectly. proves that germinating seeds produce carbon dioxide. the carbon dioxide produced by germinating seeds is absorbed by the potassium hydroxide solution. now as carbon dioxide is produced due to the consumption of oxygen during respiration therefore.KOH absorbs the carbon dioxide released by the germinating seeds and a partial vacuum is created because of the loss of carbon dioxide in the flask. This vacuum causes the water level in the delivery tube to rise up The rise in the level of water indicates that CO2 is produced by germinating seeds during respiration. Actually, the germinating seeds respire and produce CO2, which is absorbed by KOH solution. This creates a vacuum in the conical flask.

Answer 2

Precautions to be taken are:

1)always remember to keep KOH in the apparatus.

2) The apparatus should be sealed properly from bottom

3) Always take germinating seeds