Question: What is plaster of Paris How is it obtained Class 11 chemistry?

What is plaster of Paris How is it obtained?

Plaster of Paris is obtained by heating gypsum or calcium sulphate dihydrate to about 140-180 degree Celsius. When heated to such a temperature, gypsum forms Plaster of Paris. The name is derived from the large deposits of gypsum in the Montmartre hill in Paris.

What is plaster of Paris chemistry?

The chemical name of plaster of Paris is calcium sulphate hemihydrate because half-molecule of water is attached with calcium sulphate. The chemical formula of plaster of Paris is CaSO4​. 1/2H2O. Advantages: It is light in weight and more durable.

What is plaster of Paris how it is obtained give its important uses?

Plaster of Paris is a building material that is used as a protective coating on walls and ceilings. … Plaster of Paris is used to make sculptures and metal castings used as decorative in buildings. • It is also used in buildings to avoid fire hazards as Plaster of Paris is fire resistant.

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What is plaster of Paris how it is obtained from gypsum write chemical reaction give its one use?

It is CaSo4. 1/2H2O. This calcium sulphate hemihydrate is prepared by heating the gypsm at 373K. It loses water molecules to form calcium sulphate hemihydtate.

What is plaster of Paris How is it obtained from gypsum write the chemical equation involved give its one use?

Plaster of Paris is prepared by heating gypsum at 373 K. On heating, it loses water molecules and becomes calcium sulphate hemihydrate (CaSO4. 1/2 H2O) which is called Plaster of Paris.

What is plaster of Paris How is it obtained from gypsum Class 10?

The plaster of paris is obtained by heating gypsum at 373 K. … The plaster gets its name because its main ingredient gypsum is found abundantly in Paris. The white powder will form a paste when it is mixed with water and it will harden into solid structures when dried.

How is plaster of Paris prepared write chemical equation?

Plaster of paris is prepared by heating calcium sulfate dihydrate, or gypsum, to 120–180 °C (248–356 °F). 2(CaSO4. 2H2O)——–>2(CaSO4). H2O + 2H2O is the chemical equation.

How plaster of Paris can be obtained write its three uses?

2H2O), known as plaster of Paris. Used in making casts and patterns for molds and statues. Used as the cement in ornamental casting and for making decorative materials. Used as a fireproofing material and for making chalks.

What are the uses of plaster of Paris Class 10?

– Plaster of Paris is used in filling cracks in walls and gaps. – It is stable at high temperatures, so it is used as fireproofing material. – Plaster of Paris is used in preparing mould, statues and artificial decorative items. – Plaster of Paris is used to make the cast that is used in case of bone fracturing.

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