ACIDIMETER 



35 



ACIDS 



Acidimeter {as-id-im' '-et-er) [acidum, acid ; fterpov, a 

 measure]. An instrument for performing acidimetry. 



Acidimetry (as-id-im' -et-re) [acidum, acid ; fiirpov, a 

 measure]. Determination of the free acid in a solu- 

 tion by an acidimeter, or by chemical reactions. 



Acidity' yas-id' -it-e) [acidum, acid]. The quality of 

 being acid ; sourness ; excess of acid. 



Acidology (as-id-ol' -o-je) \iuuq, a bandage, a point; 

 '/oyoc, a treatise] . The science of surgical appliances. 



Acidometry (as-id-om' -et-re). See Acidimetry. 



Acidopeirastic (as-id-o-pi-ras' -tik) \atdc, a point; 

 - oa'eiv, to test]. See Akidopeirastic. 



Acidosteophyte {as-id-os' -te-o-flt) [anig, a point ; osteo- 

 phyte]. A sharp, or needle-shaped, osteophyte. 



Ac'ids, Aromatic. Acids derived by replacing hydro- 

 gen in the benzenes by carboxyls. They are crystalline 

 solids that generally sublime undecomposed. Most of 



them dissolve with difficulty in water. A., Diazo. 

 See Diazo Acids. A., Dibasic, acids containing two 

 carboxyl groups. They are solids, crystallizable, and 

 generally volatile without decomposition." They are 

 mostly soluble in water and have a strong acid reaction. 

 See Table. A., Fatty, a class of monobasic acids, 

 formed by the oxidation of the primary alcohols. The 

 more complex fatty acids are found in all oleaginous 

 compounds, where they exist combined with glycerin, 

 forming fats. The fatty acids have a general formula 

 C n H 2n 02. See Table. A., Monobasic, products of 

 the replacement by oxygen of the two hydrogen atoms 

 attached to the carbon-earning OH. These acids 

 enter into combination with a univalent basic radical 

 to form a neutral salt, or a salt containing one equiva- 

 lent of a base. A., Organic, acids characterized by 

 the carboxyl group CO. OH. 



TABLE OF DIBASIC ACIDS OF THE FATTY COMPOUNDS. 



i. FIRST SERIES. CnHsn-sO* 



Fumaric, 



2. SECOND SERIES. UNSATURATED DICARBOXYLIC ACIDS. CnH2n-4 4 . 

 C 4 H 4 Q 4 Solid. ... ' Almost insoluble in water. 



Maleic, 



Ethidene Malonic, 



Citraconic, 



Itaconic, 



Mesaconic, 



Allyl Malonic, 



Propylidene Malonic, 



C 4 H 4 4 



Solid. 



Readily soluble in water. 



C 3 H 6 4 



Solid. 



C 5 H 6 Q 4 



Solid. 



8o° 



C 5 H 6 4 



Solid. 



161 



Slowly soluble in water. 



C 5 H 6 4 



Solid. 



Slowlv soluble in water. 



QHiA, 



Solid. 



Ci;He0 4 



Solid. 



