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reduksi: NO₂⁻ + 2 H⁺ + e⁻ --> NO + H₂O
reaksi oksidasi dikalikan satu, reaksi reduksi dikalikan 2.
oksidasi (x1) : 2 I⁻ --> I₂ + 2 e⁻
reduksi (x2) : 2 NO₂⁻ + 4 H⁺ + 2 e⁻ --> 2 NO + 2 H₂O
elektron kita eliminasi, didapat:
2 I⁻ + 2 NO₂⁻ + 4 H⁺ --> I₂ + 2 NO + 2 H₂O