Write down the equation of a chemical reaction that can be used to detect carbon dioxide.

The carbon dioxide detection reaction is one of the most demanded reactions in chemistry. To detect carbon dioxide, the chemical formula of which is CO₂, you can use lime water, or potassium hydroxide, the chemical formula of which is Ca (OH) ₂. When calcium hydroxide and carbon dioxide interact, the calcium carbonate solution becomes cloudy, due to the precipitation of calcium carbonate salt. It is thanks to this that the presence of carbon dioxide can be determined. Also, water is released in the reaction. The molecular equation of the reaction is as follows:

Ca (OH) ₂ + CO₂ = CaCO₃ ↓ + H₂O.