( 555 ) 

 P()t;issi)iiiii()(li(i(' 



G — weight of liyihaziiie ia giams. A = ae(inivalenl conduclivc power. 



g = weiglil ol' the sah ui grams. V = uuuiber of Liteis, iu which is dis- 



solved one mol. of llic siil)staiice. 



X = specific conductive power a for the water used = 0,2S.1() 



Without coaunittiug a grave error the sp. gr. of hydrazine at "25° may be taken 

 as 1.00. 



It is alretulv kintwii lh;U j^odiiiin dissolves in livdra/iiic with 

 e\oliUi()ii of hydro.uoii '). Pmv hydrazine (>i=il,l . 1()~'') was iiilroduccd 

 into the a]>i)ara1us and two pai-lieles of sodinni (weigliijig ahonl 10 

 niilli^Tams) were ad(kMl. 



Tlie metal slowly dissohed with exoliilimi of hydrogen and aflei' 

 sohilion was eoniplete the speeilie condnetixe |»ower appeared to li;i\-e 

 increased to 131.10— \ 



It seemed very peenliar that a [)owerfnl evolution of pis still went 

 on after the sodium had dissolved, showing a decomposition of the 

 hydrazine Avilh formation of ammonia. This decomposition ceased as 

 soon as the li(püd was ponred out oi' the a|)pai-atus; apparently it 

 only takes place by contact with the platinum Mack present on the 

 electrodes and is, therefore, ([uile comparable to Ihe spontaneons 

 decomposition of an alkaline solution of hydros-en |)(>ro.\ide ex[)osed 

 to the same iidliiejice. 



Finally a few expei-iuKMits were made with a solution of annnonia 

 in hydrazine. The solubility of that ,uas at the ordinary temperature 

 did not seem to be large; abont 4.3 per cent of Nil, is presejit in 

 Ihe saturated solnlion. After a few bubbles of ammonia had been 

 absorbed in Ihe hydrazine (with k = 5.2.10-') the conductive power 

 appeared to be but slightly increased (;: = (i.D.lO-^"^) : this was also 

 still the case after the licpiid had been saturated with ammonia (about 



1) I.e. p. 183. Dr. J. VV. Drro has found liial an atom of hydrogen is replaced 

 iiere; Ihe Na H;^ No fornird is a substance which on being exposed to the air 

 causes a violent spontaneous explosion. 



