A Voltaic Cell Is Based on the Following Two Half-Reactions

Multiple Choice

A voltaic cell is based on the following two half-reactions: Ni⁺²(aq) + 2e⁻ → Ni(s) E° = −0.25 V
Cr⁺³(aq) + 3e^- → Cr(s) E° = -0.74 V
Sketch the cell and then select the correct statement about it.

A) Cr serves as the cathode.
B) The direction of electron flow through the external wire is from the Ni to the Cr electrode.
C) Anions in solution will migrate toward the Ni ⁺²/Ni electrode.
D) The net cell reaction is 3Ni ⁺²( aq) + 2Cr( s) → 3Ni( s) + 2Cr ⁺³( aq)
E) = 0.99 V