Researches on the Salts of Selenious Acid. 



115 



2) 0.601 gr. salt gave 0.122 gr. selenium or 0.1714 gr. selenious acid 

 and 0.254 gr. zirconia. 



3) 0.9105 gr. salt, when dried at 100°, gave off 0.208 gr. of its weight. 



Calculated on 100 parts: 



experiment theory 



1. 2. 3. 



Zirconia 42.94 42.26 — 4Zr0 2 488 42.62 



Selenious acid . . 28.95 28.52 — 3Se0 2 333 29.08 



Water (loss) .. . 28. ll 29.22 22.84 181TO 324 28.30 



loo.oo loo.oo H45 iooToo 



At 100° the compound loses 15 mol. water out of 18 (calc. 23.58 



pr. ct.). 



2. Neutral: Zr.0 4 .2SeO + H 2 0. 



By treating 1 mol. of the basic salt with 5 mol. selenious acid at 

 a temperature of about 60°, there was obtained a crystallized compound 

 in small, but well formed, microscopical, four-sided prisms, obliquely cut 

 at the ends. Totally insoluble in water, this salt dissolved only with the 

 greatest difficulty even in boiling hydroch'oric acid. As it was dissolved 

 in this manner for the analysis, this shows a considerable loss of selenious 

 acid, owing to volatilized chloride of selenium. 



An aly ses: 



1) 0.523 gr. salt gave 0.2173 gr. selenium or 0.3053 gr. selenious acid 

 and 0.1765 gr. zirconia. 



2) 0.6155 gr. salt gave off 0.0225 gr. water at 100° and left 0.2645 gr. 

 selenium or 0.3715 gr. selenious acid and 0.2052 gr. zirconia. 



In 100 parts: 



found calculated 



1. 2. 



Zirconia........ 33.75 33.34 ZrO 2 122 33.70 



Selenious acid .... 58.37 GO. 37 2Se0 2 222 61.33 



Water (loss) 7.88 6^29 H 2 18 4.97 



100T00 TOO. 00 362 100.00 



