Calcium sulphate hemihydrate is known as:a)Plaster of Parisb)Soda ashc)Washing sodad)GypsumCorrect answer is option 'A'. Can you explain this answer?

Question

Answer

A is correct one because formula of plaster of Paris is caSo4.1/2H2O & commonly used in hospitals !!!!! Hope it will help you

Answer

Calcium sulfate hemihydrate (CS), known as plaster of Paris, is made from gypsum, and has been used for thousands of years as a building material.

Answer

A is correct because chemical name for pop is calcium hemisulphate.

Answer

The answer is A

Answer

Plaster of Paris

Plaster of Paris is the common name for calcium sulphate hemihydrate. It is a white, powdery substance that is derived from gypsum, a naturally occurring mineral. Plaster of Paris has a wide range of uses in various industries, including construction, medicine, and art.

Formation of Plaster of Paris

Plaster of Paris is formed by heating gypsum, a hydrated calcium sulfate mineral, at a temperature of about 150 degrees Celsius. This process drives off the water molecules present in gypsum, resulting in the formation of calcium sulphate hemihydrate or Plaster of Paris. The name 'Plaster of Paris' originated from the large deposits of gypsum found in the Montmartre district of Paris, France.

Properties of Plaster of Paris

Plaster of Paris has several unique properties that make it widely used in different applications:

1. Setting Time: Plaster of Paris has a relatively short setting time, usually around 10-15 minutes. This makes it ideal for quick setting and drying applications.

2. Hardening: When mixed with water, Plaster of Paris undergoes a chemical reaction that converts it back into calcium sulfate dihydrate, commonly known as gypsum. During this process, it hardens into a solid mass, making it suitable for casting and molding.

3. Workability: Plaster of Paris has excellent workability, allowing it to be easily shaped and molded into various forms. It can be poured into molds or spread over surfaces to create desired shapes.

4. Fire Resistance: Plaster of Paris exhibits good fire resistance properties, making it suitable for fireproofing applications. When exposed to high temperatures, it releases water vapor, which helps to slow down the spread of fire.

Uses of Plaster of Paris

Plaster of Paris finds numerous applications due to its unique properties:

1. Construction: Plaster of Paris is commonly used in the construction industry for creating decorative elements, such as cornices, ceiling roses, and moldings. It is also used for repairing and patching walls and ceilings.

2. Medicine: Plaster of Paris is used in the medical field for making casts and splints. It is mixed with water to form a paste, which is then applied to the injured area and allowed to harden.

3. Art and Crafts: Plaster of Paris is a popular material in art and crafts for making sculptures, models, and other creative projects. It can be easily shaped and carved, allowing artists to create intricate designs.

4. Dental Applications: Plaster of Paris is used in dentistry for making dental impressions and molds. It is mixed with water and poured into dental molds to create accurate replicas of the teeth and gums.

In conclusion, calcium sulphate hemihydrate, known as Plaster of Paris, is a versatile material with various applications in construction, medicine, art, and other industries. Its unique properties, such as quick setting time, workability, and fire resistance, make it a valuable substance in numerous fields.

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