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.
It reacts with acids to make lithium salts. Lithium hydroxide is made by reacting lithium carbonate with calcium hydroxide. A calcium carbonate solid is made and a lithium hydroxide solution is left behind. It can also be made by reacting lithium with water or by reacting lithium oxide with water. It is used in spaceships to absorb carbon dioxide.