or sodium hydrogen carbonate, chemical compound, NaHCO3, a white crystalline or granular powder, commonly known as bicarbonate of soda or baking soda. It is soluble in water and very slightly soluble in alcohol. It evolves carbon dioxide gas when heated above about 50 degrees Celsius, a property made use of in baking powder, of which it is a component. It is also decomposed by most acids; the acid is neutralized and carbon dioxide is given off. The major use of sodium bicarbonate is in foods, e.g., baked goods. It is used in effervescent “salts” and is sometimes used medically to correct excess stomach acidity. It is also used in several kinds of fire extinguishers. Although it is an intermediate product in the Solvay process for making sodium carbonate, it is more economical to prepare it from purified sodium carbonate than to purify the intermediate. Because the bicarbonate is less soluble than the carbonate, carbon dioxide gas is bubbled into a saturated solution of pure carbonate, and the bicarbonate precipitates out to be collected and dried.
Sodium bicarbonate is an antacid and is used for the rapid relief of indigestion. It is a constituent of many proprietary preparations that...
used as a gastric and systemic antacid, to alkalize urine, and for washes of body cavities. baking soda, sodium acid carbonate, sodium hydrogen carb
a white crystalline weakly alkaline salt NaHCO3 used in baking powders and in medicine especially as an antacid —called also baking soda, bicarb, bi