OXIMIDOSULPHONATES OK SULPHAZOTATES. 63 



A four-fiftlis normal putaaslnm .sodium salt, Ko-iXao-sH^-eXSaO;, 

 O'Tl^HoO, was obtained by clissolviDg dipotassiiuin oximidosniphonute 

 in sodium-chloride solution and then addinii' :immonia in excess 

 (p. 35). It separated out as a precipitate of exceedingly minute 

 prisms sHghtly opaque when \'iewed under the microscope. It was 

 free from chloride and ammonia. The atomic ratio of the metals, it 

 will be seen, is Xa : K;, and of the metals to the hydrogen as 

 (KXa), : H. 



Oalo. Found. 



Potassium iVS'OC i^S-08 



Sodium 2'od 1^*40 



Sulphur il-87 il-86 



A j'our-njths normal potassium sodium salt, but a little less basic, so 

 as to be nineteen-tn-entij-fourths normal, Ksjo^'^i^vioiß^^^:)-! l*8HoO, 

 was obtained almost in the same way as the last. Di potassium 

 oximidosulphonate in fine powder was dissolved in such quantity in 

 a saturated solution of sodium chloride that crystallisation of an 

 oximidosulphonate-chloride (p. 57) took place. This salt Avas 

 redissolved by warming in its mother-liquor to which some ammonia 

 water had been added, and the solution set aside. On cooling, the 

 above salt crystallised out in minute prisms, which in a good vacuum 

 over sulphuric acid lost nothing, although they contained water. 

 The salt was free from chlorine and anmionia. 



Calc. I'ouud. 



Potassium :^5"lo 'Jd'1\ 



Sodium o'94 3-Ül' 



Sulphur 21-94 iU-95 



A secen-nintlts normal potassium sodium salt. KuXaHo(XS.07)3, 2\rl.,0. 

 forms hard crusts of small rhombic prisms, only moderately soluble- 

 in water, and recrystallisable unchanged. It is oljtained from the 



