The cell
potential is the difference between the electrode potentials (reduction
potentials) of the cathode and anode It is called the cell electromotive
force (emf) of the cell when no current is drawn through the cell It
is now an accepted convention that we keep the anode on the left and
the cathode on the right  while representing the galvanic cell A galvanic
cell is generally represented by putting a vertical line between metal
and electrolyte solution and putting a double vertical line between
the two electrolytes connected by a salt bridge