3Cu⁰+8HN⁺⁵O₃ =3Cu⁺²(NO₃)₂ +2 N⁺²O +4H₂O
Cu⁰-2e⁻ ⇒ Cu⁺² 2 3
6
2N⁺⁵+3e⁻ ⇒ N⁺² 3 2
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3Cu⁰ + 2N⁺⁵=3Cu⁺² + 2N⁺²
3Cu+8HNO₃=3Cu(NO₃)₂ +2 NO +4H₂O
2NO + O₂ = 2NO₂
4NO₂ + 2H₂O+ O₂ =4HNO₃
HNO₃ +KOH =KNO₃ + H₂O
2KNO₃=2KNO₂+O₂
2KNO₂+H₂SO₄=K₂SO₄+2HNO₂