Final answer:
In a galvanic cell, the reaction at the positive pole or cathode is the reduction of cations like Cu²+ to their metallic form, which is a spontaneous process facilitated by a positive cell potential.
Step-by-step explanation:
When using the galvanic current, the positive pole, known as the cathode, is where the reduction reaction happens. In a galvanic cell, such as one with copper and zinc, the positive pole sees the reduction of Cu²+ ions to solid copper. The overall process is spontaneous, with the flow of electrons towards the positive pole driving the reduction reaction. The cell potential is positive, indicating that the reaction proceeds without the need for an external energy source. By definition, a galvanic cell operates with a spontaneous reaction, which is facilitated by the flow of ions via a salt bridge that helps maintain charge balance while allowing the distinct redox reactions to take place at each electrode.