Question

A voltaic cell consists of a sodium anode and an iron cathode. How will the electrons move?

A. Electrons will move across the salt bridge from the cathode to the anode.
B. Electrons will move across the wire from the anode to the cathode.
C. Electrons will move across the salt bridge from the anode to the cathode.
D. Electrons will move across the wire from the cathode to the anode.

Answer 1

Electrons will move across the salt bridge from the anode to the cathode

Step-by-step explanation:

Answer for Educere/ Founder's Education

Answer 2

C. Electrons will move across the salt bridge from the anode to the cathode

Step-by-step explanation:

A voltaic cell is a cell in which chemical reactions are used to produce electrical energy in form of current.

Such a cell is made up of two electrodes and their electrolytes. The electrodes are connected via a salt-bridge. The salt bridge allows electrons to move between the electrodes.

In a voltaic cell, oxidation reaction occurs in the anode. During oxidation, electrons are produced. Therefore, the Na electrode in the anode will lose an electron spontaneously. At the cathode, reduction occurs. The Iron electrode here will gain the electron poduced by the oxidation reaction at the anode. The salt bridge moves the electrons from the anode to the cathode.