![]() ![]() ![]() Similarly, the Cl – ions lose electrons ( oxidation) at the electrode connected with the negative terminal resulting in Cl 2 gas. On reaching the respective electrode, the battery potential allows the gaining of electrons ( reduction) by the Na+ ions, forming sodium metal. The electrode connected with the negative terminal of the battery attracts the Na + ions while the anions i.e., Cl – flows towards the electrode connected with the positive terminal. Along with this, the two electrodes are connected by a battery. In the molten state, Na+, and Cl – ions get separated and are in the free state. ![]() Here sodium chloride in the molten state is taken into which a pair of electrodes are immersed. Let us understand this by considering an electrolytic cell arrangement shown below: However, on considering the electrolytic cell, the anode and cathode terminal polarity will get reversed. However, the direction of the flow of current will be opposite to the flow of current.Īs you have noticed here that among the two electrodes, oxidation occurs at the Zinc electrode thus is anode with negative polarity and reduction occurs at the Copper electrode thus is cathode with positive polarity in a galvanic cell arrangement. The movement of anions (negatively charged particles) generates a current which flows through the metallic wire. Further, the switch is in the on state and we will get the closed-circuit arrangement then the electrons from the Zn electrode migrate ( oxidation) through the salt bridge and get reduced at the Cu electrode ( reduction). The two electrodes of zinc and copper that will act as anode and cathode are connected by a metallic wire through a switch.ĭuring the open condition of the switch, due to the open circuit arrangement, no reaction will occur in any of the beakers and so there will be no flow of current through the wire. To maintain electric contact between the two solutions a salt bridge containing potassium chloride is used. Here in the two separate beakers, we have copper sulphate and zinc sulphate solution. Hence, here the anode will attract positively charged particles and the cathode will attract the negatively charged particles.Ĭonsider a galvanic cell arrangement shown below in order to understand how the flow of current through the solution takes place.
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