Chemistry · S and p Block Elements
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When Gypsum is heated to about 100° C, it losses some water of crystallization and becomes:
- A
Epsom salt
- B
Kieserite
- C
Plaster of Paris
- D
Bleaching Powder
- E
Caustic soda
When gypsum (calcium sulfate dihydrate) is heated to approximately 373 K (100°C), it loses part of its water of crystallization, resulting in the formation of calcium sulfate hemihydrate, commonly known as Plaster of Paris. This transformation is unique to gypsum and its chemical composition. The other options, such as Epsom salt, kieserite, bleaching powder, and caustic soda, are chemically distinct and do not undergo similar transformations when heated. Epsom salt and kieserite are magnesium-based compounds, while bleaching powder and caustic soda are used for entirely different purposes.
Epsom salt, or magnesium sulfate, does not relate to gypsum. It is primarily used in baths for its soothing properties.
Kieserite is a form of magnesium sulfate monohydrate, unrelated to the transformation of gypsum.
When gypsum is heated to about 100°C, it loses part of its water of crystallization and becomes calcium sulfate hemihydrate, known as Plaster of Paris.
Bleaching powder, or calcium hypochlorite, is a chemical used for disinfection and is not related to gypsum.
Caustic soda, or sodium hydroxide, is a strong base and is unrelated to gypsum or its transformations.
Tagged under Chemistry · S and p Block Elements · 2011