Thus, an anode attracts negatively charged particles while a cathode attracts positively charged particles. ![]() For an electrolytic cell, anode acts as a positive terminal while a cathode holds negative polarity.This is so because the terminal polarity varies according to the type of cell i.e., electrolytic or galvanic in use. The specific denotation of the anode as positive and cathode as negative is wrong.While cathode corresponds to the electrode where reduction i.e., the gain of electrons occurs. The key factor of differentiation between anode and cathode is that anode corresponds to the electrode where oxidation i.e., loss of electrons occurs.Key Differences Between Anode and Cathode In electrolytic cell, it is a source of negative charge or electron donor. In electrolytic cell it is a source of positive charge or electron acceptor. ![]() Content: Anode Vs CathodeĪn anode in electrolytic cell attracts anions.Ī cathode in electrolytic cell attracts cations. when the electrode gains electrons which are released by the electrolyte undergoes reduction. However, when the reverse operation occurs i.e. It specifies the conductive phase where the transfer of charged carriers takes place.Īn electrode that loses electrons and is accepted by the electrolyte undergoes oxidation. More specifically, we can say, it is regarded as a surface where a redox reaction takes place between the metal and the solution.Įlectrode generally represents an electrical conductor/ semiconductor within the electrochemical cell. Electrode acts as a metallic contact through which the current enters and leaves the electrolyte. But first, see-Ī crucial component of an electrochemical cell that makes contact with electrolyte is known as an electrode. But in this content, you will get to know that the differentiation between anode and cathode is not merely done according to the type of polarity. People generally in misconception regards anode particularly as positive and cathode particularly as negative. Textbook content produced by OpenStax is licensed under a Creative Commons Attribution License. We recommend using aĪuthors: Paul Flowers, Klaus Theopold, Richard Langley, William R. ![]() Use the information below to generate a citation. Then you must include on every digital page view the following attribution: If you are redistributing all or part of this book in a digital format, Then you must include on every physical page the following attribution: If you are redistributing all or part of this book in a print format, Want to cite, share, or modify this book? This book uses the The reactions associated with this process are: The industrial process typically uses a Downs cell similar to the simplified illustration shown in Figure 17.18. Metallic sodium, Na, and chlorine gas, Cl 2, are used in numerous applications, and their industrial production relies on the large-scale electrolysis of molten sodium chloride, NaCl( l). The Electrolysis of Molten Sodium Chloride To illustrate the essential concepts of electrolysis, a few specific processes will be considered. Perhaps less familiar is the use of electrolysis in the refinement of metallic ores, the manufacture of commodity chemicals, and the electroplating of metallic coatings on various products (e.g., jewelry, utensils, auto parts). A familiar example of electrolysis is recharging a battery, which involves use of an external power source to drive the spontaneous (discharge) cell reaction in the reverse direction, restoring to some extent the composition of the half-cells and the voltage of the battery. ![]() This final section of the chapter will address an alternative scenario in which an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction, a process known as electrolysis. In these cells, electrical work is done by a redox system on its surroundings as electrons produced by the redox reaction are transferred through an external circuit.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |