What is the role of potassium hydroxide in the activity?
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Potassium hydroxide is used in the experiment for the absorption of CO2 from the plant released during respiration. When KOH absorbs CO2, it creates a vacuum in the flask.
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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.
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