Cell EMF The difference in electrical potential between the anode and cathode is .Electromotive Force (EMF) .Cell Potential (Ece Cell Voltage (Ece Electromotive Force (EMF):The force required to push electrons through the external circuit anode 1/2H,(g）+Fe3+(aq)→H+(aq)+Fe2+(ag) nn metal =Ecathode-Eamnode-E redox couple ZnS0, CUSOA• Electromotive Force (EMF) • Cell Potential (Ecell) •Cell Voltage (Ecell) Cell EMF The difference in electrical potential between the anode and cathode is : E E E cell cathode anode ° ° ° = − Electromotive Force (EMF): The force required to push electrons through the external circuit 3 2 2 / / cell cathode anode Fe Fe H H E E E E E + + + ° ° ° ° ° = − = − 3 2 2 1 2 ( ) ( ) ( ) ( ) H g Fe aq H aq Fe aq + + + + → + redox couple