Soda powder is the "surface alkali" in life. Soda powder can be found everywhere, in supermarkets, small shops and grain and oil shops. The price is less than a bag of 2 yuan.

Soda powder is also called sodium bicarbonate, carbonated drinks, such as Sprite and 7-up. Sodium bicarbonate is an acid salt formed by neutralization of strong base and weak acid, and it is weakly alkaline when dissolved in water. Soda powder is used as a foaming agent for rubber and plastic phenolic resin, and also as an auxiliary foaming agent for PVC and polystyrene. In the food industry, it is used as a starter, a carbon dioxide generator in soda and cold drinks, and a preservative for butter. Soda powder can be directly used as raw material of pharmaceutical industry, wool detergent and foam extinguishing agent. It can also be used in film production, tanning, mineral processing, metallurgy, metal heat treatment and agricultural seed soaking agent.