what is the action of metals on nitric acid
Answers
Answer:
Reactions with metals
Dilute nitric acid behaves as a typical acid in its reaction with most metals. Magnesium, manganese, and zinc liberate H2: Mg + 2 HNO3 → Mg(NO3)2 + H2 (Magnesium nitrate)
Explanation:
Answer:
Explanation:
Nitric acid is normally considered to be a strong acid at ambient temperatures.
This means that the nitric acid in diluted solution is fully dissociated except in extremely acidic solutions
Nitric acid can act as a base with respect to an acid such as sulfuric acid:
HNO3 + 2 H2SO4 ⇌ NO2+ H3O + 2HSO4
Reactions with metals
Nitric acid reacts with most metals, but the details depend on the concentration of the acid and the nature of the metal.
Nitric acid has no action on gold, platinum, iridium, tantalum, rhodium, and titanium. All other metals are attacked by the acid, often with the formation of nitrates, and reduction products of the nitric acid, which vary with the temperature and concentration of the acid.
the reactions of copper and silver with nitric acid, and showed that tin differed from these in the production of, ammonia.
The mechanism of the reaction between nitric acid and various metals has been the subject of considerable controversy for many years. Armstrong and Ackworth put forward the theory that nascent hydrogen was the initial substance which brought about reduction of nitric acid:
M + HNO3= MNO3 + H.
This nascent hydrogen did not escape from the solution owing to the powerful oxidising nature of nitric acid, but produced as secondary products nitrous acid, hyponitrous acid, hydroxylamine, and ammonia. Tertiary reactions occurred from the decomposition of these secondary products, with the formation of nitric oxide, nitrogen trioxide, and nitrous oxide; while double decomposition between the secondary products resulted in the formation of nitrogen and nitrous oxide.