2Na2CO3

2Na2CO3 represents two moles of sodium carbonate. Sodium carbonate, with the chemical formula Na2CO3, is an inorganic compound. It is a common salt of sodium. In its pure form, it is a white, odorless powder or granular solid. Sodium carbonate is soluble in water, forming a basic solution due to hydrolysis. It is commonly known as washing soda or soda ash.

Historically, sodium carbonate was produced from ashes of plants, hence its name. Modern production is primarily through the Solvay process, which involves reacting sodium chloride and calcium carbonate with ammonia. It is a key ingredient in the manufacture of glass, detergents, and other chemicals. Sodium carbonate also finds applications in water treatment to soften water and in the food industry as a food additive (E500). In laboratories, it is used as a titrant and a source of carbonate ions. The presence of two moles signifies a specific stoichiometric quantity in a chemical reaction or a compound formulation.