H. Wurtz’ Contributions to Analytical ec 375 
8. Hyd Re 
alkali- teetadn, =e dvie wa ought to comport itself 
oni acid like ch ihe ; i arts erm 
ehuisis depends u er this ralidion " uisouall of cours _— true 
eory of the met 
had mma his elegant rites bine regarding og rn 
Lussac’s acids had ceased, and the li id at first highly colored, 
A ger ees No trace of chlorine could any longer 
be found in 
4, Bajrotioon. —A strong solution of pure chlorid of magne- 
sium mixed with pure nitric acid of sp. gr. 1:29 and evaporated 
Upon the sand bath, left a residue in which chlorine was still 
metal under the influence of heat, are not occasioned simply and aan by the com- 
bination of such h drogen or metal with the oxygen of the acid to form 
water, Se ns the formation of NO2012 ia aqua regia, ct he to Gay-Lussac 
reacti 
HCl-++-NO5=3HO-+Cl+-NO2 Cl ; 
and in the formation of ‘hos Cl, 3H cna —3HO+Cl2-LNO2 (1. 
“ned also at Maumené’s reaction between sal-ammoniac and nitrate of ammonia 
Y big and Ko opp’s Jahresbericht for 1851, p. 821; Am, Jour. Science, [2], xiii, 
2,) im which are obtained five yolumes of nitrogen and one of chlorine, 
NH Cl+ 2(NH40,NO5 )==12HO+CI1-+-5N ; 
oat at som Soaaed equation representing the formation of laughing gas from nitrate 
eer ete 
3(NH10, NOs )=12HO+6N0. 
might oth — ly examples, but these will serve to illustrate my mean- 
ne ela that in all the above cases all the hydrogen presen 
mes water ory the nse of the oxygen of the nitric acid, and the other ele- 
. e 
a Mstance that uw on chlorid of sodium, the products of pieey according rose 
ota and NO2Cl2 (or something having the same mrutislett:s Betis 
: 3NaCl-+4NO s=3(Na0, NOs)-+014+NO2Cl2 ; 
a that of nitric acid upon sal-ammoniac would be 
8NH40l4-4NOs=12HO-+Cl+NO2Cl2 +6NO; 
ae atone an resent striking analogies. is i ; e the 
me Dr. Sm : with this last equation: The gaseous’ mixture which he exam- 
was collected 0 over hot water, which would absorb the N O2Cls, her with 
€ verification of this othesis seems to me a t worthy of att 
i be kept in view throughout the beens investigation, as this may farilop ‘facts 
ne light upon these reactions 
I may add here axe n careful ‘comparison of the color of the gas evolved by 
regia, th in its acti n sal-ammoniac with 7 t of the gas evolved by aqua 
© twoa red, not only to my own eyes but to t s, to 
be the same, ie 5 rey xt of alsw ig differing merely in shade 
tint in the € case of sal-ammoniac be 
