SOLUTION OF SODA 127 



Derivation. — It is made from liquor sodae by evapora- 

 tion, and run in moulds. 



Properties. — Dry, white, translucent pencils, or fused 

 masses, showing a crystalline fracture ; odorless, and having 

 an acrid and caustic taste. Exposed to the air it rapidly 

 deliquesces, absorbs carbon dioxide, and becomes covered 

 with a dry coating of carbonate. Soluble in 1.7 parts of 

 water ; very soluble in alcohol. 



Liquor Sod^. Solution of Soda. (U. S. & B. P.) 



An aqueous solution of sodium hydrate, containing 

 about 5 per cent, of hydrate. 



Synonym. — Solution of sodium hydrate, E.; natrum 

 hydricum solutum, sonde caustique liquide, Fr.; liquor natri 

 caustici, P. G.; aetznatron lauge, G. 



Derivation. — An aqueous solution of sodium carbonate 

 is boiled with calcium hydrate, and the supernatant liquid 

 is siphoned off. 



Na,C03 + Ca(OH), = 2 NaOH + CaCOa. 



Properties. — A clear, colorless liquid, odorless, having a 

 very acrid and caustic taste, and a strongly alkaline reaction. 



Dose.—U.&C, 5 ss.-i. (15.-30.); Sh. & Sw., 3 ss.-i. (2.-4); 

 D., IT^v.-xx. (.3-1.8). 



Action and Uses. — Soda and liquor sodae resemble similar 

 compounds of potassium, but are used chiefly for chemical 

 and pharmaceutical purposes. 



Liquor sodae should be given largely diluted with water. 

 In poisoning by the caustic alkalies or soap lye, use emetics 

 or stomach pump ; and give vinegar, diluted acetic acid, 

 lemon juice and demulcents. 



SoDii Carbonas. Sodium Carbonate. Nag Co, 10 H2O. 



(U. S. & B, P.) 



Synonym. — Washing soda, sal soda, carbonas sodicus, 

 E.; natrum carbonicum crudum, P. G.; carbonate de soude, 

 Fr.; kohlensaures natron, soda, G. 



