Question

In an experiment to determine the boiling point of water state reason for: (1) pumice stone pieces are added to water in a beaker (2) a glass stirrer is used

Answer 1

1. Pumice stone is added to avoid the bumping of the water. When the temperature is raised for boiling it do not let the water to form the bumps. As it is porous, it provides the space for the air. The air makes the bubbling in the liquid which helps in boiling

2. A glass stirrer is used to ensure the uniform heating of water