How is the soybean milk and bean curd brain made in junior middle school chemistry? What and what reaction? Generate what? What is the reaction equation?
The precipitation and solidification of colloid. It's a physical reaction, not a chemical reaction. The organic component of soybean milk is mainly protein, and protein is colloid. There are the following methods to accelerate the precipitation and solidification of colloid: Strengthening alkali, strong acid, adding electrolyte, adding metal salt, heating, etc. Actually, soybean milk turned into bean brain is caused by adding brine (mainly used in the north, mainly containing magnesium chloride, calcium sulfate, calcium chloride and sodium chloride, etc.) or gypsum water (mainly used in the south, CaSO4) electrolyte and heating.