Copper + Concentrated Nitric Acid

Copper + Concentrated Nitric Acid: Brown NO₂ gas produced; blue Cu²⁺ solution. Step-by-step mechanism, reagents and practice.

What happens

Brown NO₂ gas produced; blue Cu²⁺ solution.

Reaction summary

Cu + 4HNO₃(conc) → Cu(NO₃)₂ + 2NO₂ + 2H₂O

Reagents and conditions

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