Chemistry Each of the following reducing agents react with VO2+: Zn, Sn, S2O32- , Fe2+. Using the oxidation potentials below and the reduction potentials for vanadium listed on the first page of this experiment, predict the final oxidation state of VO2 + when it is mixed with each reducing agent. Reduction Agent Half-Reaction Potential Zn Zn ----> Zn2+ + 2 e- + 0.76 V Sn Sn ---> Sn2+ + 2 e- + 0.14 V S2O32- S2O32- + 3 H2O ---> 2 H2SO3 + 2 H+ + 4 e- -0.40 V Fe2+ Fe2+ ---> Fe3+ + e- -0.77 V Reduction potentials for vanadium: VO2+ + 2H+ + e- ---> VO2+ + H2O E° = 0.99 V VO2+ + 2H+ + e- ---> V3+ + H2O E° = 0.34 V V3+ + e- ---> V2+ E° = -0.26 V

Chemistry Each of the following reducing agents react with VO2+: Zn, Sn, S2O32- , Fe2+. Using the oxidation potentials below and the reduction potentials for vanadium listed on the first page of this experiment, predict the final oxidation state of VO2 + when it is mixed with each reducing agent. Reduction Agent Half-Reaction Potential Zn Zn ----> Zn2+ + 2 e- + 0.76 V Sn Sn ---> Sn2+ + 2 e- + 0.14 V S2O32- S2O32- + 3 H2O ---> 2 H2SO3 + 2 H+ + 4 e- -0.40 V Fe2+ Fe2+ ---> Fe3+ + e- -0.77 V Reduction potentials for vanadium: VO2+ + 2H+ + e- ---> VO2+ + H2O E° = 0.99 V VO2+ + 2H+ + e- ---> V3+ + H2O E° = 0.34 V V3+ + e- ---> V2+ E° = -0.26 V

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter22: Bulk Electrolysis: Electrogravimetry And Coulometry

Section: Chapter Questions

Problem 22.20QAP

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Chemistry

Each of the following reducing agents react with VO₂⁺: Zn, Sn, S₂O₃^2- , Fe²⁺. Using the oxidation potentials below and the reduction potentials for vanadium listed on the first page of this experiment, predict the final oxidation state of VO2 + when it is mixed with each reducing agent.

Reduction Agent	Half-Reaction	Potential
Zn	Zn ----> Zn²⁺ + 2 e-	+ 0.76 V
Sn	Sn ---> Sn²⁺ + 2 e-	+ 0.14 V
S₂O₃^2-	S₂O₃^2- + 3 H₂O ---> 2 H₂SO₃ + 2 H⁺ + 4 e-	-0.40 V
Fe²⁺	Fe²⁺ ---> Fe³⁺ + e-	-0.77 V

Reduction potentials for vanadium:

VO₂⁺ + 2H⁺ + e- ---> VO²⁺ + H₂O	E° = 0.99 V
VO²⁺ + 2H⁺ + e- ---> V³⁺ + H₂O	E° = 0.34 V
V³⁺ + e- ---> V²⁺	E° = -0.26 V

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