Question

What happens when plaster of

Paris is kept uncovered for a long time. Write the equation

of reaction occurring​

Answer 1

When the plaster of paris is kept uncovered for a long time it converts to gypsum.

• The chemical formula of plaster of paris is $CaSO_4.0.5H_2O$.
• When plaster of paris is kept uncovered for a long time it reacts with the water of air and form gypsum. Plaster of paris reacts with 1.5 moles of water to form gypsum.
• The balanced chemical equation for the formation of gypsum from plaster of paris is as follows-
• $CaSO_4.0.5H_2O+1.5H_2O\rightarrow CaSO_4.2H_2O$.