A white coloured powder is used by doctors for supporting fractured bones.
(a) Write chemical name and formula of the powder.
(b) When this white powder is mixed with water a hard solid mass is obtained. Write balanced chemical equation for the change.
Answers
Answer:
Answer. Plaster of Paris the substance used to treat the fractured bones. The chemical name of the powder is known as calcium Sulphate Hemihydrates. Water of crystallization is the added to the plaster of Paris to make it more durable
Answer:
Question :
A white coloured powder is used by doctors for supporting fractured bones.
Answer :
Question :
(a) Write chemical name and formula of the powder.
Answer :
The chemical formula for the plaster of Paris is (CaSO4) H2O and is better known as calcium sulfate hemihydrate.
Question :
(b) When this white powder is mixed with water a hard solid mass is obtained. Write balanced chemical equation for the change.
Answer :
As plaster of Paris reacts with water, heat is released through crystallisation.
As water is added to dry plaster of Paris powder, it reforms into gypsum.
Gypsum transforms to hemihydrate or anhydrous form depending on the temperature.
Equation :
CaSO4.1/2H2O + 3/2H2O → CaSO4.2H2O