How is the plaster of Paris prepared ? What is its chemical formula and chemical name ?

Answer: 

Plaster of Paris is a well-known chemical component found in sculpting materials and gauze bandages. Plaster of Paris is a white powdery chemical compound that is hydrated calcium sulphate that is commonly created by calcining gypsum, and it has many applications in our daily life. In other words, Plaster of Paris is frequently made by heating gypsum to a high temperature.

Plaster of Paris is a quick-setting gypsum plaster composed of fine white powder (calcium sulphate hemihydrate) that hardens when wet and dries. Plaster of Paris, known since antiquity, got its name from the abundance of gypsum found in Paris.

The chemical substance calcium sulphate dihydrate, generally known as gypsum, is used to make plaster of Paris. CaSO₄.2H₂O is the chemical formula for gypsum. PoP is created by heating the element gypsum to a very high temperature of around 373K. When this occurs at such a high temperature of 373K, almost three-fourths of the crystallisation water is lost.

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