Sodium bicarbonate is baking soda.

Sodium bicarbonate, with the molecular formula NaHCO?, is an inorganic compound in the form of a white crystalline powder, odorless, salty in taste, and easily soluble in water. It decomposes slowly in humid air or hot air to produce carbon dioxide, which is completely decomposed when heated to 270°C. When encountering acid, it decomposes strongly and produces carbon dioxide. Sodium bicarbonate is widely used in analytical chemistry, inorganic synthesis, industrial production, agricultural and animal husbandry production, etc.

Sodium bicarbonate is a white crystal or an opaque monoclinic fine crystal. It is odorless, slightly salty and cool in nature. It is easily soluble in water and glycerin, but insoluble in ethanol. Sodium bicarbonate is stable at room temperature, easily decomposes when heated, decomposes rapidly above 50°C, completely loses carbon dioxide at 270°C, has no change in dry air, and slowly decomposes in humid air.

Introduction to the application fields of sodium bicarbonate:

1. Laboratory uses

Sodium bicarbonate can be used as an analytical reagent and also in inorganic synthesis. It can be used to prepare sodium carbonate-sodium bicarbonate buffer solution. When adding a small amount of acid or alkali, it can keep the hydrogen ion concentration from changing significantly and keep the pH value of the system relatively stable.

2. Industrial use

Sodium bicarbonate can be used to produce acid-base fire extinguishers and foam fire extinguishers. In the rubber industry, sodium bicarbonate can be used in the production of rubber and sponges. In the metallurgical industry, sodium bicarbonate can be used as a flux for casting steel ingots. In the machinery industry, sodium bicarbonate can be used as a forming aid for cast steel (sand foundry) sand molds. In the printing and dyeing industry, sodium bicarbonate can be used as a fixing agent for dyeing and printing, an acid-base buffering agent, and a post-processing agent for fabric dyeing and finishing. Adding baking soda to dyeing can prevent the yarn tube from producing color flowers, and can also be used to wash wool. agent.

Reference for the above content: Baidu Encyclopedia-Sodium Bicarbonate