Plaster of Paris should be stored in a moisture-proof container. Explain why?



Plaster of paris is a white powder. If it is not stored in a moisture-proof container, then it might react with moisture that penetrates through the container..

Upon reaction with water, it gets converted into a hard substance, called gypsum, whose properties are entirely different from that of plaster of paris.

The reaction takes place as follows

Reaction between Plaster of Paris and Water - Teachoo-01.jpg

After being converted into gypsum, it becomes unfit for use.

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CA Maninder Singh is a Chartered Accountant for the past 13 years and a teacher from the past 17 years. He teaches Science, Economics, Accounting and English at Teachoo