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Plaster of Paris is a substance that becomes hard when mixed with water. It is commonly used in construction and Arts and Crafts for making molds and sculptures.

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1y ago

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What happens when plaster of Paris mix with water?

Plaster of Paris is formed from gypsum. The gypsum is heated to 150 decrees Celsius and becomes a dry powder. When this powder is mixed with water it re-forms into a paste and eventually hardens into a solid. The powder mixed with water is held together by hydrogen bonds in the water molecules. This is a week bond that is easily broken. When Plaster of Paris and water are mixed together they undergo a chemical change. The particles rearrange to make a completely new substance. When plaster of Paris and water are mixed together the mixture becomes warm releasing energy in the form of heat therefore undergoing a chemical change.


How does a solid become a liquid?

Freezing. The cold slows down the particles in the water and it becomes hard