6
Question
What is the role of KOH in experiment?
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Solution
To understand the role of KOH in experiment to show carbon dioxide is necessary for photosynthesis, the experiment is as follows:
∙ Take a plant with destarched leaves.
∙ Insert a part (half) of one of its leaves (through a split cork) into a conical flask containing potassium hydroxide. (Potassium hydroxide absorbs carbon dioxide).
∙ Leave the plant in sunlight.
∙ After a few hours, test the leaf for starch.
The portion of leaf which was exposed to the atmospheric air becomes blue-black, and the part of the leaf inside the flask containing KOH does not become blue-black, proving that carbon dioxide is essential for photosynthesis.
Thus, role of KOH is to absorb carbon dioxide present inside the conical flask.
To understand the role of KOH in experiment to show carbon dioxide is necessary for photosynthesis, the experiment is as follows:
∙ Take a plant with destarched leaves.
∙ Insert a part (half) of one of its leaves (through a split cork) into a conical flask containing potassium hydroxide. (Potassium hydroxide absorbs carbon dioxide).
∙ Leave the plant in sunlight.
∙ After a few hours, test the leaf for starch.
The portion of leaf which was exposed to the atmospheric air becomes blue-black, and the part of the leaf inside the flask containing KOH does not become blue-black, proving that carbon dioxide is essential for photosynthesis.
Thus, role of KOH is to absorb carbon dioxide present inside the conical flask.
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