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Name the hard substance used to make plaster of paris? How pop is prepared with the help of this substance?pls provide correct information and answer! |
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Answer» PLASTER of Paris is made by heating the mineral gypsum. Large DEPOSITS were originally FOUND outside of Paris in France hence its name. When gypsum is heated to about 150°C it losses water and produces the powder, plaster of Paris Descriptively: Gypsum =heat→ Plaster of Paris + steam Chemically: 2CaSO4·2H2O + heat → 2CaSO4·½H2O + 3H2O So, the chemical formula for plaster of paris is CaSO4·½H2O. When water is added to the plaster of Paris powder it rehydrates (absorbs water) and quickly hardens. Descriptively: Plaster of Paris + water → Gypsum + heat 2CaSO4·½H2O + 3H2O → 2CaSO4·2H2O + heat Plaster of Paris can be USED for casts to hold broken limbs in place, modeling casts, sculptures and in plasterboard WALLS and ceilings, commonly called Gyprock. |
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