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23 May, 03:43

Why is sodium sulphate hemihydrate called as "Plaster of Paris"?

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  1. 23 May, 03:49
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    Calcium sulphate hemihydrate (CaSO₄.1/2H₂O) is also called as the Plaster of Paris because of the reason that Paris, during 18th century, became the major center of this compound's production.

    Plaster of Paris is a hemihydrate of Gypsum and gypsum ores were available in huge amounts around Paris.

    Even now, Paris is a major site for the production of this hemihydrate of Calcium sulphate.

    Hence the name Plaster of Paris.
  2. 23 May, 07:13
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    Do you mean semi-aqueous gypsum calcium?

    Is called a semi-aqueous gypsum calcium sulfate, as the formula: CaSO4 * 1/2 H 2 O molecule of water is half (hemihydrate), contains sulfur (sulfate), and calcium (Ca).

    Gypsum is a common name because it is used in construction.
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