Class 12 Chemistry — Chapter 2: Electrochemistry

What you'll learn

• ▸Electrochemical Cells: Galvanic vs. Electrolytic
• ▸Components of a Galvanic Cell
• ▸Electrode Potential and Standard Electrode Potential
• ▸Cell Potential (EMF) and Cell Representation
• ▸Standard Hydrogen Electrode (SHE)
• ▸Gibbs Energy and Cell Work

Chapter Summary

--- PAGE 1 --- Unit 2 Electrochemistry Objectives After studying this Unit, you will be able to • describe an electrochemical cell and differentiate between galvanic and electrolytic cells; • apply Nernst equation for calculating the emf of galvanic cell and define standard potential of the cell; • derive relation between standard potential of the cell, Gibbs energy of cell reaction and its equilibrium constant; • define resistivity (ρ), conductivity (κ) and molar conductivity (Λm) of ionic solutions; • differentiate between ionic (electrolytic) and electronic conductivity; • describe the method for measurement of conductivity of electrolytic solutions and calculation of their molar conductivity; • justify the variation of conductivity and molar conductivity of solutions with change in their concentration and define Λ°m (molar conductivity at zero concentration or infinite dilution); …

Practice Questions from this Chapter

Tap "Get Solution" on any question to ask our AI tutor.

1. Describe how a galvanic cell works. Get Solution →
2. Illustrate chemical energy becoming electricity. Get Solution →
3. Prevent rusting on metal objects. Get Solution →
4. What is the study of the production of electricity from spontaneous chemical reactions and the use of electrical energy for non-spontaneous reactions called? Get Solution →
5. Which type of electrochemical cell converts chemical energy from a spontaneous redox reaction into electrical energy? Get Solution →
6. In a galvanic cell, what is the electrode where oxidation occurs called? Get Solution →
7. By convention, what potential is assigned to the standard hydrogen electrode (SHE) at all temperatures? Get Solution →
8. In the standard notation for a galvanic cell, what does the double vertical line (||) represent? Get Solution →

Did you know?

• 💡 The first battery was a stack of metal discs and wet cardboard.
• 💡 Rusting iron on Mars makes the entire planet look red.
• 💡 Your brain uses tiny electrical signals to send messages throughout your body.
• 💡 Sodium metal can explode when it touches water because of strong electrochemical reactions.
• 💡 Electric eels generate powerful electric shocks using specialized cells in their bodies.

Frequently Asked Questions

Related Chapters