What is the chemical formula acid?

Answer 1

Answer

Limestone is largely composed of calcium carbonate, also known as CaCO3.

This can become quicklime (Calcium Oxide) and carbon dioxide from high levels of heat. This can be shown as:

Calcium Carbonate = Calcium Oxide + Carbon Dioxide.

CaCO3 = CaO + CO2

Quicklime can become slaked lime (solid state) or limewater (aqueous state) or calcium hydroxide from adding water. This produces heat in an exothermic reaction.

Calcium hydroxide = Calcium Oxide + Water

CaOH2 = CaO + H2