ELECTROCHEMISTRY | Complete Chapter in 1 Shot | Class 12th Board-NCERT
NCERT Wallah・2 minutes read
Electrochemistry is a crucial chapter for Class 12 Chemistry and NEET exams, covering topics like galvanic cells, electrolytic cells, and batteries. The conversion of electrical energy to chemical energy, electrode potential measurements, reduction potential, and electrolysis products are essential concepts discussed in the text.
Insights
- Electrochemistry, a crucial topic for Class 12 Chemistry and NEET exams, involves the conversion of electrical energy to chemical energy through galvanic cells (spontaneous reactions) and electrolytic cells (non-spontaneous reactions), with the former generating electricity spontaneously and the latter requiring external current for electricity production.
- Understanding electrode potential, reduction potential, and Faraday's Law is essential for determining products in electrolysis, with factors like concentration, conductance, and molar conductance playing key roles in the process, emphasizing the importance of these concepts in exam preparation and practical applications.
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Recent questions
What is Electrochemistry?
Electrochemistry involves the conversion of electrical energy to chemical energy and vice versa. It encompasses galvanic cells, electrolytic cells, conductance in solutions, batteries, and corrosion.
How are galvanic cells and electrolytic cells different?
Galvanic cells produce electricity spontaneously, while electrolytic cells require external current to produce electricity. Galvanic cells involve spontaneous reactions, while electrolytic cells involve non-spontaneous reactions.
What is the purpose of a salt bridge in a galvanic cell?
A salt bridge is used to maintain neutrality in the solutions of a galvanic cell, ensuring continuous electron flow between the two half cells. It prevents the buildup of charge and allows the cell to function properly.
How is electrode potential measured in electrochemistry?
Electrode potential is measured using a Standard Hydrogen Electrode under standard conditions at 25 degrees Celsius. The potential is considered zero for the Standard Hydrogen Electrode, and a voltmeter is used to measure the potential of the test electrode.
What determines the product in electrolysis?
Reduction potential determines the product in electrolysis. For example, in the electrolysis of sodium chloride, Na+ is reduced at the cathode, and Cl- is oxidized at the anode. The product formed depends on the reduction potential of the elements involved.
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