70 ^' DIVERS AXD T. HA(iA. 



Bariiuii sodiiuii oximidosidpJionates. — A normal one-fifth «odium 

 salt, Ba6Na3(]srS207)5, 7HoO, is obtained when to normal sodium 

 oximidosulphonate in strong solution, one mol., there is added barium 

 chloride, one mol. It was also obtained by adding baryta-water to a 

 strong solution of the normal sodium salt kept in excess. The pre- 

 cipitate unwashed or slightly washed is dried on a porous tile. It 

 loses only one-third of its water at 120°. ((<) was obtained from barium 

 chloride and (h) from barium hydroxide :— 



Calc. found. 



(a) (h) 



ßarium 11-79 42-02 42-24 



Sodium 3-51 3-60 3-44 



Sulphur lG-27 15-69 15-97 



Another normal, only one-seventh sodium, salt, Ba9Na3(NS207)7, 

 7H2O, can be obtained by adding baryta-water to a mixed soluti(3n of 

 one mol. of disodium salt and one mol. of barium chloride, and in 

 other w;)vs. (u) and (A) were se}>arate ])reparations : — 



Calc. Found. 



(a) (h) 



Barium 44-71 44-70 44-18 



Sodium 2--")(i 2-40 2-47 



Sulphur 16-24 15-.S3 — 



A normal salt richer in sodium wa.^ got from mois, of triso- 

 dium and o ]jiols. of disodium salt ground together with hardly 

 enouiih water to dissolve all, by addiny' to the mixture very liraduallv 

 and with tritiu'ation a dilute solution of <jne mol. of barium chloride, 

 half of which was added befjre it caused any precipitation in tlie now 

 dissolved salts. The mixture quickly thickened to a nearly opaque 

 firm jelly which after a time broke up into a thoroughly li(juid 



