Question

Define Plaster of paris !​

Answer 1

There are two meanings:

1. A soft mixture of sand and cement and sometimes lime with water, for spreading on walls, ceilings, or other structures, to form a smooth hard surface when dried.

Example in a sentence: Strip away the plaster to expose the bare brick.

2. A hard white substance made by the addition of water to powdered and partly dehydrated gypsum, used for holding broken bones in place and making sculptures and casts.

Example in a sentence: He had both arms in plaster.

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Answer 2

Answer: Plaster of Paris is also referred to as Gypsum Plaster the chemical formula of Plaster of Paris is written as CaSO4·1/2H2O.

Explanation: Plaster of Paris is a popular chemical substance that is utilized most commonly for sculpting materials and in gauze bandages. Plaster of Paris is a white powdery chemical compound that is hydrated calcium sulfate that is usually obtained from calcining gypsum. In other words, we can say that the Plaster of Paris is usually made up of heated gypsum at a high temperature.

Plaster of Paris is manufactured by heating gypsum at 373 – 393 K or 150° C/300° F.

CaSO4·2H2O + heat → CaSO4·0.5H2O + 1.5H2O