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Electrochemistry Class 12 Notes Chemistry Chapter 2

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FAQs on Electrochemistry Class 12 Notes Chemistry Chapter 2

1. What is electrochemistry?
Ans. Electrochemistry is the branch of chemistry that studies the interconversion of electrical and chemical energy. It focuses on the transfer of electrons between different substances, which allows for the generation of electric current or the use of electrical energy to drive chemical reactions.
2. What are the applications of electrochemistry?
Ans. Electrochemistry has various applications in different fields. Some of the common applications include batteries and fuel cells for energy storage and conversion, electrolysis for metal refining and electroplating, corrosion prevention, sensors and biosensors for analytical purposes, and electrochemical machining for precision manufacturing.
3. How does an electrochemical cell work?
Ans. An electrochemical cell consists of two electrodes, an anode (positive electrode) and a cathode (negative electrode), immersed in an electrolyte solution. When a potential difference is applied between the electrodes, oxidation occurs at the anode, where electrons are released and flow through an external circuit to the cathode. At the cathode, reduction takes place, where the electrons combine with ions from the electrolyte. This flow of electrons creates an electric current.
4. What is the difference between a galvanic cell and an electrolytic cell?
Ans. A galvanic cell is a type of electrochemical cell that spontaneously converts chemical energy into electrical energy. It produces an electric current through a spontaneous redox reaction. In contrast, an electrolytic cell is a non-spontaneous electrochemical cell that requires an external power source to drive a non-spontaneous redox reaction. It is used for electrolysis processes or to recharge a galvanic cell.
5. What is electrode potential?
Ans. Electrode potential, also known as redox potential, is the measure of the tendency of an electrode to gain or lose electrons. It is the electric potential difference between an electrode and its surrounding solution at equilibrium. Electrode potential is a crucial factor in determining the direction and extent of redox reactions in electrochemical cells. It is commonly measured against a standard hydrogen electrode (SHE) or a reference electrode.
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