NCERT Solutions for Class 12 Chemistry Chapter 3 Electrochemistry


Electrochemistry is the branch of chemistry that deals with the relationship between chemical energy and electrical energy produced in a redox reaction and how they can be converted into each other. After studying electrochemistry, students will be able to describe an electrochemical cell and differentiate between galvanic and electrolytic cells. Students will learn the application of the Nernst equation for calculating the emf of a galvanic cell and define the standard potential of the cell.

This chapter has derivations of the relation between the standard potential of the cell, Gibbs energy of cell reaction and its equilibrium constant. Electrochemistry solution will define resistivity (p), conductivity (K) and molar conductivity (Am) 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 the change in their concentration and define Aom (molar conductivity at zero concentration or infinite dilution); enunciate Kohlrausch law and learn its applications. Understand quantitative aspects of electrolysis; describe the construction of some primary and secondary batteries and fuel cells, and explain corrosion as an electrochemical process.