120 INOKGANIC AGENTS 



of the hydrate and carbonate. Water dissolves mainly the 

 carbonate which is obtained by evaporation of the aqueous 

 solution. 



Properties. — A white, granular powder, odorless, and 

 having a strongly alkaline taste ; very deliquescent. Soluble 

 in 1.1 parts of water ; insoluble in alcohol. 



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

 D.,gr.v.-xx. (.3-1.3). 



PoTASSii BiCARBONAS. Potassium Bicarbonate. KHCog 



(U. S. & B. P.) 



Synonym. — Doppelkohlensaures kali, G. 



Derivation. — Obtained by passing a stream of Coj through 

 a solution of the carbonate. 



K,Co3 + Co, + H,0 = KHC03. 



Properties. — Colorless, transparent, monoclinic prisms, 

 odorless and having a saline and slightly alkaline taste. 

 Permanent in the air. Soluble in 3.2 parts of water. Almost 

 insoluble in alcohol. Becomes converted into the carbonate 

 by boiling. 



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

 D., gr.v.-xx. (.3-1.3). 



Preferable to carbonate for internal use, as it is less 

 irritating. 



PoTASSii AcETAS. Potassium Acetate. KCgHgO, 

 (U. S.&B. P.) 



Synonym. — Terra foliata tartari, E.; Essigsaures kali, G. 



Derivation. — Add acetic acid in excess to potassium 

 carbonate. Evaporate to dryness and fuse residue. 

 K,Co3 + 2 HC,H30, = 2 KC.HsO, + H,0 + Co,. 



Properties. — A white powder, or crystalline masses of a 

 satiny lustre ; odorless and having a warming, saline taste. 

 Very deliquescent on exposure to the air. Soluble in 0.36 

 part of water and in 1.9 parts of alcohol. 



Dose. — Same as bicarbonate. - 



