Final answer:
In an unbalanced redox equation, electrons are transferred between elements or ions. The anode involves the oxidation of Cr, while the cathode involves the reduction of Cu²+. The balanced equation is 2Cr + 3Cu²+ -> 2Cr³+ + 3Cu.
Step-by-step explanation:
An unbalanced redox equation involves a transfer of electrons between elements or ions. In this case, the anode (oxidation) is represented by the reaction: Cr(s) -> Cr³+(aq) + 3e-, and the cathode (reduction) is represented by the reaction: Cu²+(aq) + 2e- -> Cu(s). The overall balanced equation is: 2Cr(s) + 3Cu²+(aq) -> 2Cr³+(aq) + 3Cu(s).