1, chemical properties are different. Edible baking soda is chemically known as sodium carbonate, the molecular formula for Na2CO3, white powder, while the chemical name of the baking soda is sodium bicarbonate, the molecular formula for the NaHCO3, baking soda is a solution or crystals of soda ash to absorb carbon dioxide after the finished product.
2, the role of different uses. Edible soda is one of the important chemical raw materials, used in the manufacture of chemicals, cleaning agents, detergents, also used in photography and the manufacture of pharmaceuticals. The vast majority of them are used in industry, a small part of the civilian. In the industrial soda ash, mainly light industry, building materials, chemical industry, followed by metallurgy, textile, petroleum, national defense, medicine and other industries. And baking soda is mainly used as fermentation agent for food work, carbon dioxide generator in soft drinks and cold drinks, and preservation agent for butter. It can be directly used as a raw material in the pharmaceutical industry for the treatment of hyperacidity. It is also one of the most widely used sparging agents in the food industry, used in the production of cookies, pastries, steamed bread, bread, etc. It is the carbon dioxide generating agent in soft drinks; it can be compounded with alum as alkaline leavening powder, and can also be compounded with soda ash as civil litharge.