^>nie MM heating anil oiliefs even at the ordinary" trmperat ure : the 

 suh>t:u ces taken are oxidised and t'ne nitric acid is deoxidised, yielding 

 compounds ci iii t aininu' less oxygen. < Milv a te\v metals, such as ufold 

 and platinum, do not act on nitric acid, hut the majority decompose it : 

 in so dojnu, an oxide if the nr-tal is formed, which, if it has the 

 character ,,f ,-i base, acts on the remaining nitric acid ; therefore, with 



' . it- volume, it- \\i-i-iit and consequently its amount in a L'iveii 



ic th' 1 a :ii' 'ii n; of iixyu r 'ii 1'V tin- increase iii 

 lit. l-'i ir nil ric acid t hi,- de 



equal ii Hi 'JII N< )-, .".( 'n I I ,( ) - 

 N - ")( 'n( >. Tlii- reaction mn-t 

 1"' [.receded l.\ the formation 

 ol ci >)i|M'i- nit rate. ( 'in N( )- 1 .. he- 

 citn e , xide oi copper ton,,, this 

 salt u ith nil ric a< id. Tin, ,alt is 

 \ \ery nn-tal.le. and evolves oxv- 



i. .* red heat. The C(,mplete iliTiilll- 



|io it ion of nit ric ,i r jd is al-o 

 ace, iinpli^lied li\ pa- -. i : rj a mix 

 hin i>l I - dro; , n and nitric acid 

 \ Mpi.ur - ! Im.u.L'li a red lioi tulic. 

 i-oii nil ro-.-n I.eiiiL' formed 



dr. jell. SnilillMI illH de, ompo-es till- oxides 



' i] ' Tlii method is sometimes n-..'d for 



