Question

What is plaster of paris chemically?how is it prepared?list its two important uses

Answer 1

Hi friend.....
Plaster of paris.. CaSO4.1/2H2o
Is prepared by heating gypsum at 373 k it loses water molecules and becomes calcium sulphate hemihydrate that is plaster of paris.

It is used for making toys and to hold the fractured leg in the upright position.. It is also used to make the surfaces smooth

HOPE IT HELPS YOU!

Answer 2

Because calcium sulfate is connected to a half-molecule of water, plaster of Paris is known chemically as calcium sulfate hemihydrate.

Plaster of Paris:

• Because it was widely mined from the Paris neighborhood of Montmartre, Plaster of Paris (POP) got its name.
• However, they have been discovered inside ancient pyramids, indicating that their usage predates the Industrial Revolution.
• When plaster of Paris is cured, it becomes a very porous substance that will absorb any fresh water that comes in contact with it.
• Plaster of Paris must have as many surface holes as possible filled in order to be waterproof for outdoor use or brief exposure to water.

How is POP prepared?

• Gypsum is heated to between 373 and 393 K, or 150° C and 300° F, to create plaster of Paris.
• Gypsum loses water molecules when heated between 373 and 393 K, turning into calcium sulfate hemihydrate.
• Plaster of Paris is the name of this item.
• However, dried plaster of Paris restructures into gypsum when water is added.

Uses of POP:

• used to create patterns and castings for sculptures and molds.
• used to create beautiful materials and as the cement in ornamental casting.
• used to make chalks and as a fireproofing substance.
• used in hospitals to keep the injured area immobile in the event of a bone fracture or sprain.
• used to cover partitions, ceilings, and walls.

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