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Now, balance the e- in the reduction half-reaction: 3е¯ + MnО¯ + 4H+ MnO2 + 2H2O Re-writing the equations over each other: [CN + H₂O [3e- + MnO4¯ + 4H+ CNO- + 2H+ + 2e-] x3 MnO2 + 2H2O] x2 Balance the electrons in each half-rxn so that they can be added: 3CN- + 3H2O- 3CNO + 6H++ 6e- 6-+2MnO4 + 8H+ 2MnO2 + 4H₂O 3CN + 2MnO4 + 2H+ 3CNO + 2MnO2 + H2O CN + MnO CNO + MnO2 The two half-reactions are: CN- CNO- MnO4¯ MnO2 (oxidation) (reduction) Balance each half-reaction as if it occurred in acidic solution: The oxidation half-reaction: CN- + H₂O CNO + 2H+ CN- + H₂O - CNO + 2H+ + 2e- Balance the reduction of permanganate by adding O atoms via H₂O molecules, then balance using H+: MnO4 + 4H+ MnO2 + 2H2O

Now, balance the e- in the reduction half-reaction: 3е¯ + MnО¯ + 4H+ MnO2 + 2H2O Re-writing the equations over each other: [CN + H₂O [3e- + MnO4¯ + 4H+ CNO- + 2H+ + 2e-] x3 MnO2 + 2H2O] x2 Balance the electrons in each half-rxn so that they can be added: 3CN- + 3H2O- 3CNO + 6H++ 6e- 6-+2MnO4 + 8H+ 2MnO2 + 4H₂O 3CN + 2MnO4 + 2H+ 3CNO + 2MnO2 + H2O CN + MnO CNO + MnO2 The two half-reactions are: CN- CNO- MnO4¯ MnO2 (oxidation) (reduction) Balance each half-reaction as if it occurred in acidic solution: The oxidation half-reaction: CN- + H₂O CNO + 2H+ CN- + H₂O - CNO + 2H+ + 2e- Balance the reduction of permanganate by adding O atoms via H₂O molecules, then balance using H+: MnO4 + 4H+ MnO2 + 2H2O

General Chemistry - Standalone book (MindTap Course List)
General Chemistry - Standalone book (MindTap Course List)
11th Edition
ISBN:9781305580343
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Chapter19: Electrochemistry
Section: Chapter Questions
Problem 19.101QP: Balance the following skeleton equations. The reactions occur in acidic or basic aqueous solution,...
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Now, balance the e- in the reduction half-reaction: 3е¯ + MnО¯ + 4H+ MnO2 + 2H2O Re-writing the equations over each other: [CN + H₂O [3e- + MnO4¯ + 4H+ CNO- + 2H+ + 2e-] x3 MnO2 + 2H2O] x2 Balance the electrons in each half-rxn so that they can be added: 3CN- + 3H2O- 3CNO + 6H++ 6e- 6-+2MnO4 + 8H+ 2MnO2 + 4H₂O 3CN + 2MnO4 + 2H+ 3CNO + 2MnO2 + H2O
Transcribed Image Text:Now, balance the e- in the reduction half-reaction: 3е¯ + MnО¯ + 4H+ MnO2 + 2H2O Re-writing the equations over each other: [CN + H₂O [3e- + MnO4¯ + 4H+ CNO- + 2H+ + 2e-] x3 MnO2 + 2H2O] x2 Balance the electrons in each half-rxn so that they can be added: 3CN- + 3H2O- 3CNO + 6H++ 6e- 6-+2MnO4 + 8H+ 2MnO2 + 4H₂O 3CN + 2MnO4 + 2H+ 3CNO + 2MnO2 + H2O
CN + MnO CNO + MnO2 The two half-reactions are: CN- CNO- MnO4¯ MnO2 (oxidation) (reduction) Balance each half-reaction as if it occurred in acidic solution: The oxidation half-reaction: CN- + H₂O CNO + 2H+ CN- + H₂O - CNO + 2H+ + 2e- Balance the reduction of permanganate by adding O atoms via H₂O molecules, then balance using H+: MnO4 + 4H+ MnO2 + 2H2O
Transcribed Image Text:CN + MnO CNO + MnO2 The two half-reactions are: CN- CNO- MnO4¯ MnO2 (oxidation) (reduction) Balance each half-reaction as if it occurred in acidic solution: The oxidation half-reaction: CN- + H₂O CNO + 2H+ CN- + H₂O - CNO + 2H+ + 2e- Balance the reduction of permanganate by adding O atoms via H₂O molecules, then balance using H+: MnO4 + 4H+ MnO2 + 2H2O
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