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AsO₃³⁻ + H₂O ⇒ AsO₄³⁻ + 2H⁺ + 2e .............×9
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2Cr₂O₇²⁻ + 9AsO₃³⁻ + 10H⁺ ⇒ 4Cr³⁺ + 9AsO₄³⁻ + 5H₂O
Sn²⁺ ⇒ Sn⁴⁺ + 2e .............. ×3
IO₃⁻ + 6H⁺ + 6e ⇒ I⁻ + 3H₂O
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3Sn²⁺ + IO₃⁻ + 6H⁺ ⇒ 3Sn⁴⁺ + I⁻ + 3H₂O
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AsO₃³⁻ + H₂O ⇒ AsO₄³⁻ + 2H⁺ + 2e .............×9
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2Cr₂O₇²⁻ + 9AsO₃³⁻ + 10H⁺ ⇒ 4Cr³⁺ + 9AsO₄³⁻ + 5H₂O
Sn²⁺ ⇒ Sn⁴⁺ + 2e .............. ×3
IO₃⁻ + 6H⁺ + 6e ⇒ I⁻ + 3H₂O
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3Sn²⁺ + IO₃⁻ + 6H⁺ ⇒ 3Sn⁴⁺ + I⁻ + 3H₂O