Explain why, metals usually do not liberate hydrogen gas with dilute nitric acid. What happens
when magnesium reacts with very dilute nitric acid ? Write an equation for the reaction which
takes place
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Metals do not liberate hydrogen gas with nitric acid because nitric acid is a strong oxidizing agent. So, as soon as hydrogen gas is formed in the reaction between a metal and dilute nitric acid, the nitric acid oxidisesthis hydrogen to water.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)
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