Search results
Results from the WOW.Com Content Network
It is a multi-step nitrogen fixation reaction that uses electrical arcs to react atmospheric nitrogen (N 2) with oxygen (O 2), ultimately producing nitric acid (HNO 3) with water. [1] The resultant nitric acid was then used as a source of nitrate (NO 3 −) in the reaction + + + which may take place in the presence of water or another proton ...
The dioxide then disproportionates in water to nitric acid and the nitric oxide feedstock: 3 NO 2 + H 2 O → 2 HNO 3 + NO. The net reaction is maximal oxidation of ammonia: NH 3 + 2 O 2 → HNO 3 + H 2 O. Dissolved nitrogen oxides are either stripped (in the case of white fuming nitric acid) or remain in solution to form red fuming nitric acid.
A number of side reactions compete with the formation of nitric oxide. Some reactions convert the ammonia to N 2, such as: 4NH 3 + 6NO → 5N 2 + 6H 2 O. This is a secondary reaction that is minimised by reducing the time the gas mixtures are in contact with the catalyst. [6] Another side reaction produces nitrous oxide:
Indeed silver nitrate can be prepared by dissolving silver in nitric acid followed by evaporation of the solution. The stoichiometry of the reaction depends upon the concentration of nitric acid used. 3 Ag + 4 HNO 3 (cold and diluted) → 3 AgNO 3 + 2 H 2 O + NO Ag + 2 HNO 3 (hot and concentrated) → AgNO 3 + H 2 O + NO 2
The phase diagram of the system H 2 O − N 2 O 5 shows the well-known negative azeotrope at 60% N 2 O 5 (that is, 70% HNO 3), a positive azeotrope at 85.7% N 2 O 5 (100% HNO 3), and another negative one at 87.5% N 2 O 5 ("102% HNO 3 "). [15] The reaction with hydrogen chloride HCl also gives nitric acid and nitryl chloride NO 2 Cl: [16] N 2 O ...
It can be produced by the condensation of nitric acid and methanol: [3] CH 3 OH + HNO 3 → CH 3 NO 3 + H 2 O. A newer method uses methyl iodide and silver nitrate: [4] CH 3 I + AgNO 3 → CH 3 NO 3 + AgI. Methyl nitrate can be produced on a laboratory or industrial scale either through the distillation of a mixture of methanol and nitric acid ...
Add 1 ml of concentrated HNO 3 to 1 ml of the test sample. Gently heat the mixture and cool it. Slowly add sodium hydroxide (NaOH, 40 % w/v in water) solution until the mixture becomes alkaline and a colour change is observed. If the colour changes from yellow to orange, this indicates the presence of an aromatic amino acid.
The anion [Ce(NO 3) 6] 2− is generated by dissolving Ce 2 O 3 in hot and concentrated nitric acid (HNO 3). [2] The salt consists of the hexanitratocerate(IV) anion [Ce(NO 3) 6] 2− and a pair of ammonium cations NH + 4. The ammonium ions are not involved in the oxidising reactions of this salt.