CBSE · Class 12 · Chemistry · Chapter 2

Electrochemistry

Electrochemical cells, Nernst equation and electrolysis.

13 lessons 189 min
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Lessons in this chapter

  1. 1Redox Reactions, Cells and Current PathsConnect chemical change with electrical work, trace electrons and ions, and distinguish spontaneous discharge from driven electrolysis.
  2. 2Electrode Potentials and the Hydrogen ReferenceMeasure relative reduction tendencies, calculate standard cell potentials and reason about oxidising and reducing strength.
  3. 3The Nernst Equation and Nonstandard CellsDerive concentration-dependent cell potentials and use balanced reaction quotients for metal, gas and hydrogen electrodes.
  4. 4Electrical Work, Gibbs Energy and EquilibriumConnect potential with maximum electrical work and equilibrium, and distinguish intensive voltage from the amount of reaction.
  5. 5Conductivity and Its MeasurementDistinguish sample conductance from material conductivity, explain ionic transport and calibrate a conductivity cell.
  6. 6Molar Conductivity and DilutionDerive molar conductivity, handle its two unit conventions and interpret concentration plots for strong and weak electrolytes.
  7. 7Kohlrausch’s Law and Weak ElectrolytesCombine independent ionic contributions, calculate weak-electrolyte limits and infer dissociation constants from conductivity.
  8. 8Faraday’s Laws and Quantitative ElectrolysisDerive the charge-to-product relationship, calculate deposited mass and compare electrode reactions connected in series.
  9. 9Predicting the Products of ElectrolysisChoose among competing electrode reactions by considering solvent, electrode material, composition and overpotential.
  10. 10Primary Cells and Rechargeable BatteriesExplain the construction and reactions of dry, mercury, lead-storage and nickel–cadmium cells, including how charging reverses electrode processes.
  11. 11Fuel Cells and Hydrogen as an Energy CarrierTrace electrochemical energy conversion in a hydrogen–oxygen fuel cell and explain the role of catalysts, reactant supply and hydrogen production.
  12. 12Corrosion as an Electrochemical ProcessExplain local anodic and cathodic regions during rusting and connect corrosion protection methods to the reactions they interrupt.
  13. 13Chapter Summary and PracticeConnect redox direction, potential, equilibrium, ionic transport, quantitative electrolysis and electrochemical applications.
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