SODA

(Lat.), n. f. Sod'a3. Fr., soude (caustique [1st def.]). Ger., S., Sode, Natron, Aetznatron (1st def.). 1. Caustic s., sodium hydroxide; a hard, white or grayish, opaque solid, of fibrous texture, melting just below a red heat, deliquescent in moist air, efflorescent in dry air, and very soluble in alcohol, le soluble in water. It is a strongly alkaline base, of very acrid and caustic taste. From its great affinity for water, it acts as a caustic, but is le diffusive in its action than caustic potash. 2. A name applied to various salts of sodium (especially sodium carbonate or bicarbonate) formerly considered as compounds of sodium oxide with water or with acid radicles. The term is now usually restricted to the salts of sodium occurring native or used in commerce. When used without qualification, caustic s. is generally understood. [B, 5. ] 3. Carbonic-acid water. Acetas soclw |Belg. Ph.], See SODIUM acetate. For various similar forms, see the corresponding forms under SODIUM. Aqua soilae efl'ervescens, Aqua super oar bon at is sodre. See Liquor xodce effervescens. Arseiiias sodae (siccatus [Belg. Ph.]). See SODIUM arsenate. Baking s., Bicarb on as soda?. See SODIUM bicarbonate. Boras sola; (alcalescens). See Botoo; U2, blue; U3, lull; U4, full; U5, urn; L", like U (German). [s. 493]