Oxidation-Reduction Equation Balancing in Acidic Solution and Basic Solution. Balance the "breathalyze" test reaction in acidic...

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Oxidation-Reduction Equation Balancing in Acidic Solution and Basic Solution.

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Answer 1

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1. Acidic medium

(A) Oxidation 1/2 reaction:

C₂H₅OH + H₂O ----------> C₂H₅OOH + 4 H⁺ + 4e^-

(B) Reduction 1/2 reaction:

Cr₂O₇^2- + 6e^- + 14H⁺ ---------> 2Cr³⁺ + 7H₂O

(c) Over all reaction

16H⁺ + 2Cr₂O₇^2- + 3C₂H₅OH ---------> 3C₂H₅OOH + 4Cr²⁺ + 11H₂O

2.

(A) Oxidation

SnO₂^2- + 2OH- ---------> SnO₃^2- + H2O + 2e-

(b) Reduction

Fe(OH)3 + 3e- ---------> Fe + 3OH-

(C) Net reaction

2Fe(OH)3 + 3SnO₂^2- + 6OH- --------> 2Fe + 3SnO₃^2- + 3H2O

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Answer 2

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