The chemical formula for Plaster of Paris is:
A. CaSO4.2H2O
B. CaSO4.H2O
C. CaSO4.\(\frac{1}{2}\)H2O
D. 2CaSO4.H2O
Answer:C
The chemical formula for Plaster of Paris is:
A. CaSO4.2H2O B. CaSO4.H2O C. CaSO4.\(\frac{1}{2}\)H2O D. 2CaSO4.H2O
Explanation: Chemical name of Plaster of Paris is calcium sulphate hemihydrate. It is written in this form because two formula units of CaSO4 share one molecule of water.