Commutator (electric) A commutator is a moving part of a rotary electrical switch in certain types of electric motors and electrical generators that periodically reverses the current direction between the rotor and the external circuit. It consists of a cylinder composed of multiple metal contact segments on the rotating armature of the machine.
The word equation that would represent the formation of lithium oxide from lithium metal and oxygen is: lithium + oxygen to lithium oxide. In chemical symbols, the balanced chemical equation is expressed as: Li + O2 = Li2O.
Making calcium hydroxide. Calcium oxide reacts with water to form calcium hydroxide, which is an alkali. 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.Page: 1  1. 2  2. 3  3.4  4.ere 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. Page: 1  1. 2  2.