### State what spontaneous reaction will occur in aqueous

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Under standard-state conditions at 25°C, what spontaneous reaction will occur in aqueous solution among the ions Sn4+, Sn2+, Co3+, and Co2+ ? What will be the E°cell for this reaction? A. Sn2+(aq) + 2 Co3+(aq) ? Sn4+(aq) + 2 Co2+(aq) E°cell = + 1.95 V B. Sn2+(aq) + 2 Co3+(aq) ? Sn4+(aq) + 2 Co2+(aq) E°cell = + 1.69 V C. Sn4+(aq) + 2 Co2+(aq) ? Sn2+(aq) + 2 Co3+(aq) E°cell = + 1.95 V D. Sn4+(aq) + 2 Co2+(aq) ? Sn2+(aq) + 2 Co3+(aq) E°cell = + 1.69 V E. Sn2+(aq) + Co2+(aq) ? Sn4+(aq) + Co(s) E°cell = + 0.41 V

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