Question

A thick coating of a paste of Plaster of Paris (POP) is applied over the bandage
on a fractured bone. Il becomes hard on drying to keep the fractured bone
immobilised. Can the change in POP be reversed?


Answer it fast.
I have to submit homework. Please​

Answer 1

Answer:

A thick coating of a paste of Plaster of Paris (POP) is applied over the bandage on a fractured bone. It becomes hard on drying to keep the fractured bone immobilised. ... No, the change in plaster of Paris cannot be reversed. When water is added to POP, it undergoes a chemical change.

Answer 2

Answer:

This is an example of chemical change and cannot be reversed. when water is added to POP, it undergoes a chemical change and gets converted back to gypsum.

The chemical formula is

$CaSO_4.\frac{1}{2} H_2O+ 1\frac{1}{2} H_2O = CaSO_4.2H_2O$