Answer:
In a galvanic cell:
a. reduction occurs at the cathode.
b. the anode is the (-) electrode. Anions flow in solution toward the anode. Electrons flow from the anode to the cathode.
Step-by-step explanation:
The experimental apparatus for generating electricity through the use of a spontaneous reaction is called a galvanic cell or voltaic cell.
By definition, the anode in a galvanic cell is the electrode at which oxidation occurs and the cathode is the electrode at which reduction occurs.
To complete the electrical circuit, the solutions must be connected by a conducting medium through which the cations and anions can move from one electrode compartment to the other. This requirement is satisfied by a salt bridge, which, in its simplest form, is an inverted U tube containing an inert electrolyte solution, such as KCl or NH₄NO₃, whose ions will not react with other ions in solution or with the electrodes.
During the course of the overall redox reaction, electrons flow externally from the anode through the wire to the cathode. In the solution, the cations move toward the cathode, while the anions move toward the anode.
An electric current flows from the anode to the cathode because there is a difference in electrical potential energy between the electrodes.
A common example of a galvanic cell is the Daniell cell, with Zn and Cu electrodes and ZnSO₄ and CuSO₄ solutions.