PPT 9.2 Electrochemical cells tell you, How Does an Electrochemical Cell Work?
Looking to understand what an electrochemical cell is and how it works? Our guide reveals the basics of this fascinating topic as well as its applications. An electrochemical cell is a device containing an electrode and a solution that uses electricity to carry out chemical reactions. This type of cell can be used to generate electrical energy, or it can be used for electrolysis processes such as electroplating. Learn more about how electrochemical cells work and their applications here.
What is an Electrochemical Cell?
An electrochemical cell is a type of device that uses oxidation-reduction reactions to drive an electrical current. This process occurs in an electrolyte, which is typically a liquid solution like saltwater. The electrolyte contains two electrodes, which are the terminals for the current. The oxidation-reduction reaction happens at the electrodes and generates an electric potential difference between them. This creates a circuit, allowing current to flow from one electrode to another through external wires connected to the electrodes.
What are the Types of Electrochemical Cells?
There are two main types of electrochemical cells — galvanic cells and electrolytic cells. Galvanic cells can produce an electric current by themselves and are used in a wide variety of applications, such as batteries and fuel cells. Electrolytic cells, on the other hand, require an external source of energy to operate, such as direct current (DC). They are typically used in industrial processes that involve electrolysis, such as electroplating.
How is an Electrochemical Cell Constructed?
An electrochemical cell consists of two electrodes, connected by an electrolyte. The electrodes are made from conducting material such as metal, and they are separated by the electrolyte. One electrode is positively charged (the anode), while the other is negatively charged (the cathode). When electric current passes through the cell, it causes a reaction between the two electrodes and the electrolyte. This reaction produces electricity, which can then be used to power electrical devices.
How Does Electricity Flow Through an Electrochemical Cell?
Electricity flows through an electrochemical cell when there is a difference in electric potential between the two electrodes. The anode is at a higher electrical potential than the cathode. This difference in electric potential causes electrons to flow from the anode to the cathode, and this flow of electrons produces an electric current. This current then powers any device connected to the cell.
What Are Some Examples of Real-World Applications of Electrochemical Cells?
An electrochemical cell has many real-world applications. For example, they are used to generate power in batteries and fuel cells, as well as in medical devices such as pacemakers. Electrochemical cells are also used in electroplating processes to coat metal with another metal, and as an electrolysis method for separating chemical compounds. Additionally, they are useful for measuring the concentration of elements or compounds in a solution.
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