HYDROXYLAMIXE AND ITS SALTS. ROSS. 99 



The nitrous oxide ^vas tested for by e: ^ ding with hydrogen 

 in a eudiometer. When a spark from an induction coil was 

 passed through the gas and liydrogen mixed in equal vohnnes, 

 it was found that, after exploding, the volume of the mixed gases 

 was reduced one-half. Taking a larger amount of hydrogen, 

 the reduction of one volume in the same way took place. Two 

 gms. of hydroxylamine sulphate yielded 180cc. of nitrogen 

 under standard conditions. Hence the reaction which takes 

 place must be represented b}' the equation : 

 3 (NH3 0),H,S0, = (XHJ.^ SO, + 2 S 0._, + 8 H, O + 2 



x,o. 



Preparation of Hydroxylamine Chloride. 



Hydroxylamine chloride was prepared by adding to a solu- 

 tion of hydroxylamine sulphate a slight excess of barium 

 chloride. The solution was set aside over night to allow the 

 precipitated barium sulphate to settle. The clear solution was 

 then decanted off through a filter. On filtering a second time a 

 perfectly clear solution was obtained. This was evaporated to 

 dr3'ness in the same wa}' as the solution of hydroxylamine sul- 

 phate mentioned above. The residue left behind from the 

 evaporation of the liquid was found to consist principally of 

 hydroxylamine chloride, together with a little barium chloride 

 and sodium chloride. By digesting these salts with successive 

 small portions of absolute alcohol in an upright condenser, the 

 hydroxylamine chloride was separated out, leaving the sodium 

 chloride and barium chloride behind. On cooling, the hydroxy- 

 lamine chloride at once began to separate out from its solution 

 in alcohol in the form of white needle-shaped crystals. On 

 recrystallizing from alcohol several times, crystals were obtained 

 which gave no trace of either sodium or barium, and which 

 volatilized completeh' when heated on a clean porcelain surface. 



Properties of Hydroxylamine Chloride. 

 The crystals of hydroxylamine chloride obtained from water 

 much resembled those of the sulphate, but were more inclined to 



