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Question

Why is pumice stone placed usedin the beaker

tofind the boiling point of water

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Solution

Note: Pieces of pumice stone are added to water before heating to avoid bumping of liquid when the temperature rises. When water boils it releases energy as bubbles. If the bubbles do not form, the water can super heat and possibly explode. This could happen if the container is very clean and there is no means for the formation of bubbles. Adding pieces of rough stone gives lots of surface area for bubbles to form and release the energy gradually.

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