METHOD! OF OBTAINING NITROGEN GAS. 20Q
weak nitric acid. If the heat of a lamp not exceeding 80° Fahr.be then gently applied the gas will be speedily obtained.
Rationale.... Animal substances are composed of nitrogen,carbon, hidrogen and oxigen. On adding nitric acid the equili-brium of the respective affinities is destroyed, the nitrogen gasbecoming separated.
That the nitric acid does not furnish the nitrogen gas is ob-vious, from its saturating after its action as large a quantity ofalcali as before, consequently it could not have suffered any al-teration.
Remark. ..The fibrous part of animal matter is that which af-fords the most nitrogen gas; next to this all the concretiveparts, such as the clot of blood; next to that, albuminous mat-ter, such as the serum and white of eggs; gelatinous substancesafford the least.
3. Nitrogen gas may likewise be obtained by causing oxi-genated muriatic acid gas to be received in a vessel containingliquid ammonia.
Rationale. ..Ammonia consists of hidrogen and nitrogen.The hidrogen of the ammonia unites to the oxigen of the oxi-genated muriatic acid and forms water, heat is evolved, the ni-trogen becomes free, and the oxigenated muriatic acid becomesconverted into simple muriatic acid.
Other methods of obtaining nitrogen gas will be given in thenext Part.
v
O