TirEATION OF HYDEOXY AMINE. 



373 



5 CCS. of hycli'üxyamuioniutn chloride, equivalent to 10.1 ces. of 

 iodine solution, were used in each trial, after dilution to the volume 

 shown in the table by addition of either water, salt solution, or salt 

 sol ution carbo n ated . 





Vols, of the dil^ 5 ces. hydroxyammonium chloride. 



Diluent. 



15 



25 



35 



45 



55 



65 





Ces. of iodine solution required. 



Water 



Salt solution ... 

 S.S. carbonated... 



10.2 

 10.4 



10.25 

 10.45 

 10.8 



10.4 

 10.7 

 10.8 



10.45 

 11.0 



10. y 



10.55 

 11.25 

 11.5 



10.65 

 10.85 

 12.10 



Other results confirming those in the above table were obtained 

 with diiferent solutions. Blank tests showed that the diluents of 

 themselves consumed no iodine. 



The influence of carbonic acid becomes more marked with lower 

 degrees of dilution of the hydroxyamine solution, when instead of 

 employing sodium-chloride solutions charged with the gas by sending 

 a stream of it through them for an hour, solutions were prepared, in 

 imitation of what happens when an acid solution of hydroxyamine is 

 neutralised preliminary to titration, by mixing equivalent volumes of 

 hydrochloric acid and sodium carbonate. The strength of the soki- 

 tions employed were: — 



Hydroxyannnonium chloride 

 Iodine (as in last series) 

 Sodium carbonate (anhydrous) 

 Hydrochloric acid 



(j.S'2'20 grams per liter. 

 12.6238 „ „ „ 

 96.3075 „ „ „ 

 64.5079 „ „ „ 



The acid was of equivalent strength to the carbonate. 



