Name the chemical compound labeled X and state its function. Why is it necessary to place the flask in a water bath. What changes would you expect to observe in the level of coloured water in the capillary tube after the experiment has run for five minutes.

The flask is placed in a water bath to maintain a constant temperature. This is crucial because temperature fluctuations would affect the volume of gases inside the flask and the rate of respiration, leading to inaccurate results. A constant temperature ensures that any change in gas volume is solely due to the grasshopper's respiration.

The level of colored water in the capillary tube would rise (move towards the flask). This is because the grasshopper consumes oxygen, and the carbon dioxide produced is absorbed by compound X, leading to a net decrease in the volume of gas inside the flask and thus a drop in pressure.