Question

7. State the chemical name of Plaster of Paris. Write a chemical equation to show the reaction between POP and water.

Answer 1

Chemical name of plaster of paris- Calcium Sulphate.
Chemical equation for reaction between pop and water-
   CaSO4.1/2 H2O + 1 1/2 H2O⇒ CaSO4. 2H2O
Done!!!!!!!

Answer 2

"Plaster of Paris" is also known as POP. The chemical name for POP is "calcium sulphate hemihydrate". The chemical formula for POP is $\mathrm{H}_{2} \mathrm{SO}_{4 .} 1 / 2 \mathrm{H}_{2} \mathrm{O}$

EXPLANATION:

Chemical equation when POP reacts with water:

$\mathrm{H}_{2} \mathrm{SO}_{4}, 1 / 2 \mathrm{H}_{2} \mathrm{O}+\mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{CaSO}_{4} \cdot 2 \mathrm{H}_{2} \mathrm{O}$

When POP reacts with water, it forms gypsum. POP turns hard when it reacts with water and due to hydration forms crystals of gypsum. These crystals of gypsum form the hard and solid mass. This is one of the main reasons why POP finds use in several industrial applications.