What is the chemical reaction for plaster?
2H2O to CaSO4. ½H2O If water is added to the cold white powder the water recombines with the calcium(II) sulfate to form hydrated calcium(II) sulfate or plaster of Paris. As this happens the mixture gets hot which chemists call an exothermic chemical reaction.
What are the properties of Plaster of Paris Class 10?
Properties of Plaster of Paris
(1) It is a white powder. (2) It has a very remarkable property of setting into a hard mass on wetting with water. P.O.P. should be stored in a moisture proof container.
What is plaster of Paris chemically Class 10?
Calcium sulphate with half a molecule of water per molecule of the salt (hemi-hydrate) is called plaster of paris (plaster of paris). It is prepared by heating gypsum (CaSO4. 2H2O) at 120°C in rotary kilns, where it gets partially dehydrated.
What happen when plaster of Paris react with water Support your answer with chemical equation?
pop react with water to form gypsum. caso4. 1/2h20(pop) + 1×1/2h2o gives caso4. 2h20(gypsum ).
What are chemical properties?
A chemical property is a characteristic of a particular substance that can be observed in a chemical reaction. Some major chemical properties include flammability, toxicity, heat of combustion, pH value, rate of radioactive decay, and chemical stability.
What is Plaster of Paris chemically Class 11?
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 are the properties and uses of Plaster of Paris?
(i) It is used for plastering fractured bones and dislocated bones so as to set them in proper place. (ii) It is used in making toys, decorative materials. (iii) It is used in making casts for statues, toys, surgical instruments, etc. (iv) It is used in making blackboard chalks.
What is Plaster of Paris write its two properties?
It is a white powder. When mixed with water (1/3 of its mass), it evolves heat and quickly sets to a hard porous mass within 5 to 15 minutes. During setting, a slight expansion (about 1%) in volume occurs so that it fills the mould completely and takes a sharp impression.