Electrochemistry
CBSE · Class 12 · Chemistry
Summary of Electrochemistry for CBSE Class 12 Chemistry. Key concepts, important points, and chapter overview.
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Electrochemistry is the study of production of electricity from energy released during spontaneous chemical reactions and the use of electrical energy to bring about non-spontaneous chemical transformations. It connects redox reactions, cell potential, conductivity, electrolysis, batteries, fuel cel
Key Concepts
A galvanic or voltaic cell converts
A galvanic or voltaic cell converts the chemical energy of a spontaneous redox reaction into electrical energy. In the Daniell cell, zinc is oxidised
An electrolytic cell uses external electrical
An electrolytic cell uses external electrical energy to drive a non-spontaneous chemical reaction. When the applied opposing voltage becomes greater t
Standard electrode potential is the electrode
Standard electrode potential is the electrode potential measured when all species in the half-cell are at unit concentration. The standard hydrogen el
The Nernst equation gives the electrode
The Nernst equation gives the electrode potential or cell potential at non-standard concentrations. For a cell reaction, Ecell = Ecell° - (RT/nF) ln Q
The standard cell potential is related
The standard cell potential is related to standard Gibbs energy by ΔrG° = -nFEcell° and to equilibrium constant by Ecell° = (2.303RT/nF) log Kc. For t
Learning Objectives
- Describe electrochemical cells and distinguish between galvanic and electrolytic cells
- Apply the Nernst equation to calculate emf of a cell and understand standard electrode potential
- Relate standard cell potential with Gibbs energy and equilibrium constant
- Define resistivity, conductivity, and molar conductivity of ionic solutions
- Differentiate between ionic and electronic conductance
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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