A disproportionation reaction involves a substance that acts as both an oxidizing and a

Chapter 18, Problem 18.111

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A disproportionation reaction involves a substance that acts as both an oxidizing and a reducing agent, producing higher and lower oxidation states of the same element in the products. Which of the following disproportionation reactions are spontaneous under standard conditions? Calculate DG8 and K at 258C for those reactions that are spontaneous under standard conditions. a. 2Cu1 1aq2 S Cu21 1aq2 1 Cu1s2 b. 3Fe21 1aq2 S 2Fe31 1aq2 1 Fe1s2 c. HClO2 1aq2 S ClO3 2 1aq2 1 HClO1aq2 1unbalanced2 Use the half-reactions: ClO3 2 1 3H1 1 2e2 h HClO2 1 H2O % 5 1.21 V HClO2 1 2H1 1 2e2 h HClO 1 H2O % 5 1.65 V

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