Question

The amount of manganese in steel is determined by changing it to permanganate ion. the steel is first dissolved in nitric acid, producing mn2+ ions. these ions are then oxidized to the deeply colored mno4- ions by periodate ion (io4-) in acid solution. (a) complete and balance an equation describing each of the above reactions. (type your answer using the format co2 for co2, (nh4)2co3 for (nh4)2co3, [nh4]+ for nh4+, and [ni(cn)4]2- for ni(cn)42-. use the lowest possible coefficients.) equation 1

Answer 1

Step-by-step explanation:

The first reaction is oxidation of Mn to Mn²⁺ with HNO₃:

(4H⁺ + NO₃⁻ + 3e⁻ → NO + 2H₂O) x2

(Mn → Mn²⁺ + 2e⁻) x3

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(1) 3Mn + 8H⁺ + 2NO₃⁻ → 3Mn²⁺ + 2NO + 4H₂O

The oxidation to MnO₄⁻ with IO₄⁻ is:

(2e⁻ + 2H⁺ + IO₄⁻ → IO₃⁻ + H₂O) x5

(Mn²⁺ + 4 H₂O → MnO₄⁻ + 8H⁺ + 5e⁻) x2

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(2) 2Mn²⁺ + 5IO₄⁻ + 3H₂O → 2MnO₄⁻ + 5IO₃⁻ + 6H⁺