68 



E. DIVEES AXD T. HAGA. 



unstalDle, soon hydrolysing into sulphate and ox3^amidosnlphonate {cf. 

 Clans). From the normal potassium or sodium salt it precipitates 

 liarium oximidosulphonate, in combination always with some potas- 

 sium or sodium oximidosulphonate. and with very much when the 

 alkali salt is in concentrated solution and kept in excess. The alkali 

 salts intermediate to the normal and two-thirds normal salts behave 

 towards barium chloride as mixtures, the two-thirds normal alkali 

 salt remaining unprecipitated except in concentrated solutions when 

 much of it, if the potassium salt, becomes insoluble in combination 

 with the barium salt. The precipitates dissolve to some extent in 

 warm concentrated solutions of the normal and two-thirds normal 

 alkali oximidosulphonates but. for the most ]»art. separate on cooling, 

 sometimes richer in alkali salt. 



Barium hydroxide precipitates solutions of the two-thirds normal 

 as w^ell as normal salts, and all the precipitates are combinations of 

 barium with potassium or sodium salts. \Yhen the hydroxide is 

 used in excess, and when barium chloride is used in excess with the 

 normal or the intermediate salts, the precipitates are generally basic, 

 that is, have some of the barium as hydroxide. 



Annnonium oximidosulphonates behave much like the potassium 

 and sodium salts, but have a much larger solvent action upon the 

 barium precipitates. We have made no analyses of the ammonium 

 barium salts. 



There are apparently three barium salts Ba3(XSo07)o, BaHXSoO;, 

 and (HÜBa)oHNSoO; or (HOBa)Ba¥S,0, ; of which, however, the 

 second is so unstable as to be known only in solution, while the third 

 is known only in combination. 



Normal barium oximidomJplionaic, Ba3(NSo07)2, 4]rL,0 and 8H0O. — 

 The precipitate obtained by using barium chloride or hydroxide in 

 excess with a potassium or sodium oximidosulj)honate is washed and 



