Why does nitric acid render aluminium passive?

Nitric acid (dilute or conc) renders aluminium passive. Because when aluminium comes into contact with nitric acid, an impervious layer ofaluminium oxide is formed. This layer of aluminium oxide will prevent the nitric acid from coming into contact with the inner aluminium metal.

What happens when aluminium reacts with nitric acid?

Aluminum react with nitric acid to produce aluminum nitrate, nitrogen dioxide and water.

Is be rendered passive by nitric acid?

Both Be and Al become passive on reaction with conc. nitric acid due to the formation of an inert layer of oxide on the surface of metals. Also, both Be and Al are rendered passive due to formation of inert, insoluble and impervious oxide layer on their surface.

Which metal is rendered passive by nitric acid?

Iron
Why is Iron Rendered Passive in Nitric Acid. As a potent oxidising agent, Conc nitric acid transforms the metal into ferric oxide that forms an insoluble protective layer on it. The reaction stops as the metal lacks contact with acid.

How is aluminium rendered passive with concentrated nitric acid?

Action of concentrated nitric acid render aluminium passive because due to the action of acid corresponding oxides are formed for aluminium it is aluminium oxide which stops or renders further attack of the nitric acid. Products of Iron (Fe) reacting with Nitric Acid (HNO 3) depends on temperature of reactants as well as concentration of HNO 3. 1.

How does nitric acid affect aluminum and iron?

When aluminum or iron metals react with nitric acid, then formation of oxides render it passive to further reaction. In all reactions nitric acid acts as strong oxidizing agent.

Why is iron rendered passive with fuming acid?

Give reasons for the follow… Iron is rendered passive with fuming nitric acid. Metals like iron, aluminium,cobalt and nickel become inert or you can say passive when treated with pure concentrated nitric acid due to the formation of an extremely thin layer of insoluble metallic oxide on the surface.

How does nitric acid act as an oxidizing agent?

In all reactions nitric acid acts as strong oxidizing agent. Action of concentrated nitric acid render aluminium passive because due to the action of acid corresponding oxides are formed for aluminium it is aluminium oxide which stops or renders further attack of the nitric acid.