Sodium bicarbonate 

Sodium bicarbonate, commonly known as "sodium bicarbonate", commonly known as "sodium bicarbonate", "soda powder", "heavy Cao", white fine crystals, has less solubility in water than sodium carbonate. It is an industrial chemical that may be toxic. It is easily decomposed by heat. Slow decomposition of solids in humid air above 50 ° C began to gradually decompose to form sodium carbonate, carbon dioxide and water, completely decomposed at 270 ° C. All changed to sodium carbonate at 100 °C. It is soluble in 10 parts of water at 25 ° C, soluble in 12 parts of water at about 18 ° C, and insoluble in ethanol. The non-stirred solution made of cold water has only a slightly alkaline reaction to the phenolphthalein test paper, and the base is increased by placing or raising the temperature. The pH of the freshly prepared 0.1 mol/L aqueous solution at 25 ° C was 8.3. . Sodium bicarbonate is an acid salt formed by neutralization of a strong base and a weak acid, and is weakly alkaline when dissolved in water. This feature makes it a leavening agent in the food making process. Sodium bicarbonate will remain sodium carbonate after its action, and too much use will give the finished product a basic taste.


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