What is plaster of Paris formula?
Answer. 63.3k+ views. CaSO4. 1/2 H2O. Calcium sulphate with half a molecule of water per molecule of the salt (hemi-hydrate) is called plaster of paris (plaster of paris).
What is plaster of Paris Class 10?
Plaster of Paris is prepared by heating gypsum to a temperature of 373K. When gypsum is heated to a temperature of 373k ,It loses three-Fourths of its water of crystallisation and forms Plaster of Paris.
Why is the formula of plaster of Paris?
The chemical name of plaster of Paris is calcium sulphate hemihydrate because half-molecule of water is attached with calcium sulphate. The chemical formula of plaster of Paris is CaSO4. … It has no appreciable chemical action on paint and does not cause alkali attack.
What is plaster of Paris Class 11 chemistry?
CBSE NCERT Notes Class 11 Chemistry The S Block Elements. The chemical name of Plaster of Paris is Calcium Sulphate (CaSO4·½ H2O)). It is obtained by heating the gypsum, CaSO4·2H2O, to 393 K. It forms a plastic mass on addition of water which further gets hardened within 5-15 minutes.
What is plaster of Paris and uses?
Plaster of Paris is a building material that is used as a protective coating on walls and ceilings. It is also used as a moulding and casting agent for decorative elements. It is used to give aesthetic finishing touches to the buildings.
Why is formula of plaster of Paris written as CaSO4 1 2H2O?
Plaster of Paris is written in this form (CaSO4. 1/2H2O) because two formula units of CaSO4, share one molecule of water.
What is two formula unit of CaSO4?
In plaster of paris two formula units of CaSO4 share one molecule of water. In the formula it is written as half water molecule because in the formula we are showing only one unit of CaSO4.
What is the formula of plaster of paris How is it prepared state the common and the chemical names of the compound formed when plaster of paris is mixed with water?
Plaster of Paris is called calcium sulphate hemihydrate. Its formula is CaSO4. 1/2H2O. When plaster of paris is mixed with water, it forms gypsum (common name).