Question

Why is KOH taken in the watch glass?​

Answer 1

Answer:

The experiment is about testing the release of carbon-dioxide from the plants during respiration.

The main purpose of using freshly prepared KOH in the experiment is to test for the presence of CO₂ that has been released by the growing and respiring plant.

The KOH will absorb the CO₂ and form K₂CO₃ and releases water.

KOH + CO₂ → K₂CO₃ + H₂O

When all the CO₂ has been absorbed by the KOH in the watch glass, a vacuum will be created in the experimental set-up.

Explanation:

Answer 2

Explanation:

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. This pulls the water in the bent tube further up.

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