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Acids, Bases and Salts — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceAcids, Bases and Salts2 Marks
Question
A white coloured powder is used by doctors for supporting fractured bones.
When this white powder is mixed with water a hard-solid mass is obtained. Write balanced chemical equation for the change.
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Answer

When Plaster of Paris is mixed with water, a hard solid mass is obtained which is called Gypsum (CaSO4.2H2O).

$\text{CaSO}_4.\frac{1}{2}\text{H}_2\text{O}\ +\ 1\frac{1}{2}\text{H}_2\text{O}\xrightarrow{\ \ \ \ \ \ \ \ \ \ \ \ }\text{CaSO}_4.2\text{H}_2\text{O}$

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