Consider the following standard reduction potentials.
The Cr/Cr³⁺ half-reaction can be paired with the other two to produce voltaic cells because ________

Question

Consider the following standard reduction potentials. The Cr/Cr³⁺ half-reaction can be paired with the other two to produce voltaic cells because ________

Quizplus · Accepted Answer

The Cr/Cr³F1F1F1S1^F1F1F10 half-reaction can be paired with the F1F1F1S1F1F1F10 half-reactions because the reduction potential of Cr/Cr³F1F1F1S1^F1F1F10 (-0.74 V) is in between that of F1F1F1S1F1F1F10 (0.40 V) and F1F1F1S1F1F1F10 (0.23 V), indicating that it can act as both a reducing agent and an oxidizing agent in different combinations with the other two half-reactions. This allows for the production of a voltaic cell with the transfer of electrons from Cr/Cr³F1F1F1S1^F1F1F10, acting as a reducing agent, to either F1F1F1S1F1F1F10 or F1F1F1S1F1F1F10, which act as oxidizing agents.

Consider the Following Standard Reduction Potentials