Chem#10 - Name Sydney Reid College ID 0591992 Thomas Edison State University General Chemistry II(CHE-112 Section no Semester and year May 2017 Written

Chem#10 - Name Sydney Reid College ID 0591992 Thomas Edison...

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Name: Sydney ReidCollege ID: 0591992Thomas Edison State UniversityGeneral Chemistry II (CHE-112)Section no.: Semester and year: May 2017Written Assignment 10: ElectrochemistryAnswer all assigned questions and problems, and show all work. 1.Balance the following redox equations by the ion-electron method: (25 points)a. H2O2+ Fe+2→ Fe+3+ H2O (in acidic solution)Half reactions: Oxidation: Fe2+Fe3+ SoFe2+ Fe3+ + e -- (A) Reduction: H2O2 H2O Balance the charge and atoms So H2O2 +2H++ 2e 2H2O -- (B) Add both equations, A and B and cancel out the electrons to get H2O2+ 2Fe+2+ 2H+2Fe+3+ 2H2Ob.Cu + HNO3→ Cu+2 + NO + H2O (in acidic solution)
Half reactions: Oxidation: Cu Cu2+ SoCuCu2+ + 2e -- (A) Reduction: HNO3 NO Balance the charge and atoms So HNO3 +3H++ 3e 2H2O + NO -- (B) Add both equations, A and B and cancel out the electrons to get 3Cu + 2HNO3+ 6H+3Cu2++ 4H2O + 2NOc. CN+ MnO4→ CNO+ MnO2(in basic solution)Using the same procedure as in a and b to get3CN-+ 2MnO-4+ H2O 3CNO -+ 2OH-+ 2MnO2d. Br2→ BrO3+ Br(in basic solution)3Br

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