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Question
What happens when magnesium reacts with very dilute nitric acid? Write an equation for the reaction involved.
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Solution
When magnesium reacts with very dilute nitric acid, it forms magnesium nitrate and hydrogen gas is evolved.
As the nitric acid is very dilute, it acts as a weak oxidising agent, which is unable to oxidise the hydrogen gas.
Mg(s) + 2HNO3(aq) → Mg(NO3)2(aq) + H2(g)
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