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      • On heating gypsum at 373 – 393 K, it loses water molecules and becomes calcium sulphate hemihydrate. This product is known as the plaster of Paris. However, when water is mixed with dry plaster of Paris, it re-structures into gypsum.
      byjus.com › jee › plaster-of-paris

      Plaster of Paris - Definition, Plaster of Paris Uses, Types ...

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  3. www.britannica.com › technology › plaster-of-parisPlaster of paris | Definition, Uses, & History | Britannica

    plaster of paris, quick-setting gypsum plaster consisting of a fine white powder (calcium sulfate hemihydrate), which hardens when moistened and allowed to dry. Known since ancient times, plaster of paris is so called because of its preparation from the abundant gypsum found near Paris.

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  4. byjus.com › question-answer › why-we-call-hemiWhy we call hemihydrated calcium sulphate as plaster of paris

    Q. Plaster of Paris is known as calcium sulphate hemihydrate because two formula units of C a S O 4 share one molecule of H 2 O.

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  6. material-properties.org › plaster-of-parisPlaster of Paris | Formula, Properties & Application

    Scientifically known as Calcium Sulfate Hemihydrate, Plaster of Paris is chemically represented as CaSO 4 .1/2H 2 O. This represents the ratio of calcium sulfate to water, suggesting that for each molecule of calcium sulfate, there is half a molecule of water.

  7. en.wikipedia.org › wiki › Calcium_sulfateCalcium sulfate - Wikipedia

    Calcium sulfate (or calcium sulphate) is the inorganic compound with the formula CaSO 4 and related hydrates. In the form of γ- anhydrite (the anhydrous form), it is used as a desiccant. One particular hydrate is better known as plaster of Paris, and another occurs naturally as the mineral gypsum.

  8. www.artmolds.com › blogs › mold-makingThe history, development and applications of Plaster of Paris

    Feb 18, 2024 · Plaster of Paris has its origins in the Paris Basin, where large deposits of gypsum were found. The production of plaster of Paris involves a process called calcination, where the gypsum is heated to remove the water content and create calcium sulfate hemihydrate.

  9. byjus.com › jee › plaster-of-parisPlaster of Paris - Definition, Plaster of Paris Uses, Types ...

    The plaster of Paris, abbreviated as POP, is formed by heating gypsum at 373 K. Gypsum loses its water molecules and forms calcium sulfate hemihydrate, also called POP.

  10. www.sciencedirect.com › topics › chemistryCalcium Sulfate Hemihydrate - an overview - ScienceDirect

    The plaster of Paris is prepared from gypsum (calcium sulfate dihydrate (CSD): CaSO 4 ⋅ 2H 2 O) which is mined from the earth or synthesized. When heated at about 160 °C, gypsum is converted in its hemihydrate form (CSH) which is used in plaster of Paris.

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