Expand is a combination of the Latin words ex-, meaning out, and pandere, to spread. The idea of spreading out was always there, though the current idea of something actually becoming larger was first recorded in the mid-17th century.
Aragonite and calcite are two minerals formed from calcium carbonate (CaCO. Lime (calcium oxide) is produced by heating limestone or seashells (calcium carbonate). The chemistry of calcium carbonate is similar to that of sodium carbonate and potassium carbonate except that calcium carbonate is not soluble in water.
Making slaked lime. Calcium oxide reacts with water to form calcium hydroxide, also called slaked lime. Here are the equations for this reaction: calcium oxide + water â calcium hydroxide. CaO + H 2 O â Ca(OH) 2. A lot of heat is produced in the reaction, which may even cause the water to boil.f limestone is heated strongly, it breaks down to form calcium oxide and carbon dioxide. Calcium oxide is also called quicklime. It is yellow when hot, but white when cold.