Common indicators of a chemical reaction include the formation of a solid precipitate when two solutions are mixed, bubbles or fizzing indicating the release of gas, color changes in the reactants or products, temperature changes, and the emission of light.

We can identify a chemical reaction through various observable signs, including the formation of a precipitate, evolution of gas, change in color, release or absorption of heat, and production of light.

A chemical reaction is a process in which one or more substances (reactants) undergo chemical changes to form new substances (products) with different chemical properties.

Plaster of Paris is used for making casts and molds in medicine, particularly for setting fractured bones. It’s also used in dentistry, art and sculpture, construction for decorative purposes, and crafts such as model making and ornamentation.

In the chemical formula CaSO₄·1/2H₂O, only half a water molecule is shown because two formula units of CaSO₄ share one molecule of water during the formation of calcium sulfate hemihydrate.