es 
on eS ee ae oe ee 
iis ashe 
G. F. Barker on normal and derived Acids. 387 
| Inall the ortho acids the number of atoms of replaceable hy- 
} dogen, and therefore the basicity, is equal to the equivalence 
} of the radical. 1 
} ither in the free state or in their salts. Of these, ortho-h 
| chlorous HCIO, and hypo-bromous HBrO, ortho-iodous H,10,, 
& a? byposulphurous H,8O,, ortho-nitrous H,NO,, ortho- 
er of these acids are known, 
= 
ne H,BO,, ortho-carbonic H,CO,, silicic H,SiO,, stannic 
7 4,8n0,, and titanic H,TiO,, and ortho-antimonic acids 
H,S8bO, may be mentioned. wg uae 
Il. But itis at once evident that this simplicity of constitution 
of the acids is far from universal; indeed the large majority of 
h 
molecule of water can be added to it, S0+H,O=H, 5045 sie 
| *s E * 
deed, Grihiaasr tons ago showed that a single molecule of tri- 
basic phosphoric acid by 
ydrids), there may be as 
| Sic phosphoric acid. In the pa: then, from the normal 
Spi poae 
the negative oxyds ( 
