Define all about plaster of paris
Answers
Answered by
2
All about POP-
Plaster of Paris is a popular substance that is utilized most commonly for sculpting materials and in gauze bandages. While we have seen many applications of this material in our everyday lives if we try to understand its chemistry, plaster of Paris is a white powdery chemical compound which is hydrated calcium sulfate that is usually obtained from calcining gypsum.
Plaster of Paris is also referred to as Gypsum plaster. The chemical formula of plaster of Paris is written as CaSO4·H2O or 2CaSO4·H2O.
Preparation of Plaster of Paris
Plaster of Paris is manufactured by heating gypsum at 423K or 150o C/300o F.
CaSO4·2H2O + heat → CaSO4·0.5H2O + 1.5H2O (discharged as steam)
On heating gypsum at 423 K, it loses water molecules and becomes calcium sulfate 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. As for the process of hardening and setting, it starts around 10 minutes subsequent to blending and is completed in about 45 minutes. It is not completely set for 70-75 hours.
XD menu 3 war fracture hoya siga tah he aai sara pata haga hai.
Answered by
1
Answer:
Didi ji jede tuse nobody ale I'd te profile pic lage ae oe he ade te la lo
Similar questions