Question

give reaction of metal with nitric acid

Answer 1

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$<marquee> REACTION OF METALS WITH NITRIC ACID </marquee>$


1] Mg + 2 HNO3 -------> Mg(NO3)2 + H2
2] Al + 2 HNO3 -------> Al(NO3)2 + H2


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Answer 2

nitric acid acts as a strong oxidizing agent as well as an acid. Reactive metals will react with nitric acid to give the metal nitrate and hydrogen gas. Less reactive metals do not produce hydrogen at all. With dilute acid one of the principal products is nitrogen monoxide, while with concentrated acid it is nitrogen dioxide.

Both reactions give the brown fumes normally associated with nitrogen dioxide, because the nitrogen monoxide rapidly reacts with the oxygen in the air to produce nitrogen dioxide. Treating metals (iron, chromium, aluminum, and calcium) with concentrated nitric acid can produce a protective oxide layer over the metal that halts further reactions

Magnesium reacts with dilute nitric acid forms magnesium nitrate and hydrogen gas.

Mg +2HNO3 → Mg(NO3)2 +H2

When zinc reacts with nitric acid produce zinc nitrate and hydrogen gas

Zn + 2HNO3 → Zn(NO3) +H2

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.

Nitric acid is strong oxidizing agent. The hydrogen gas produced during its reaction with metal gets oxidised to H2O . Hence no hydrogen gas is produced

Cu(s) + 4HNO3(aq)--->Cu(NO3)2(aq) + 2NO2(g) + 2H2O(l)

3Ag + 4HNO3 ——→ 3AgNO3 + NO + NO2 + 3 H2O

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