Sodium Bicarbonate

              baking soda,sodium hydrogen carbonate,dicarbonate,soda mint

              Sodium bicarbonate is white crystal or opaque monoclinic crystal. The proportion is 2.15 g. Odorless, salty, soluble in water, insoluble in ethanol. Its aqueous solution is slightly alkaline due to hydrolysis and easy to decompose when heated. It will rapidly decompose if the temperature above 65℃ and completely loses carbon dioxide at 270℃. It will not change its property in dry air, but will slowly decompose in moist air. Solubility: 7.8g, 18 °C;16.0 g, 60 ° C.

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              Characteristics

              Baking soda, commonly known as "sodium bicarbonate", "soda powder", "heavy cao", which is a small white crystal, less soluble in water than Sodium carbonate. It is an industrial chemical with potential toxicity. When the temperature is above 50℃,the solid  sodium bicarbonate gradually decomposes into sodium carbonate, carbon dioxide and water. When the temperature up to 440℃, it decomposes completely. Sodium bicarbonate is an acid salt formed after neutralization of strong alkali and weak acid. This property allows it to be used as a leavening agent in food preparation. Sodium bicarbonate will remain sodium carbonate after the chemical reaction, and using too much will make the finished product have alkali taste.

              Effect

              Sodium bicarbonate can be directly used as raw material in the pharmaceutical industry to treat gastric acid overload. It can also be used for film production, tanning, dressing, smelting, metal heat treatment, and for fiber, rubber industry. It is also used as a detergent for wool and for seed soaking in agriculture. One of the most widely application is as osteoporosis agents in the food industry, for the production of biscuits, cakes, steamed buns, bread, etc., also is a carbon dioxide producer in soda drinks; It can be combined with alum for alkaline baking powder, and can be combined with soda for civilian alkali. It can also be used as butter preservative. Used in producing acid and alkali extinguisher and foam extinguisher. In the rubber industry ,take use of its property with alum, it is used for rubber and sponge production. Used as flux in casting ingot in metallurgical industry. In the mechanical industry, it is used as casting steel sand molding agent. In the printing and dyeing industry ,it is used as color fixing agent, acid and alkali buffering agent for dyeing and finishing fabrics. Baking soda is added to the dye to prevent the yarn from producing colored flowers. In the pharmaceutical industry,it is used as raw material for acid making.

              Application

              Analytical reagent; Organic synthesis; Pharmaceutical (treatment of gastric acid);Leaven (for baking cakes);Extinguisher (foam or dry powder). PH greater than 7, is alkaline, but does not contain OH-, does not belong to the base, but belongs to the acid carbonate(bicarbonate).
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