The respirometer must try to measure both gases at the same time. In order to accomplish this, Potassium Hydroxide (KOH) is added to the device. KOH absorbs carbon dioxide and forms Potassium Carbonate and water. The potassium carbonate produced is a solid precipitate.
When water level rises in the tube, it indicates that carbon dioxide is produced by germinating seeds.So, the role of KOH here is that it absorbs the carbon dioxide gas which creates a vacuum in conical flask and finally pulls the water in the bent tube which proves respiration in plants.Sep 16, 2015
How did the KOH affect the water movement in the respirometer? It allows more water into the pipette.Jun 17, 2019
KOH is a good absorbent. 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.Dec 30, 2017
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. The air present in the bent glass tube moves into the conical flask.
The role of KOH is to absorb CO2. If the bean seeds are germinating they should be using oxygen and releasing carbon dioxide.
Explain why water moved into the respirometer pipettes. The carbon dioxide reacted with the KOH resulting in a decrease in the volume of gas in the pipette and the vial. Because the pipette tip was exposed to the water bath, water moved into the pipette.May 25, 2019
the water moved into the pipette because the vial and pipette were completely submerged into the bath. Rate of cellular repsiration is greater in germinating peas than in non-germinating peas.