CBSE Class 12 Chemistry Electrochemistry Notes and Questions

CBSE Class 12 Chemistry Electrochemistry Notes and Questions. Based on CBSE and CCE guidelines. The students should practice these Questions to gain perfection which will help him to get more marks in CBSE examination. Based on CBSE and CCE guidelines. The preparation should be in a manner which helps the students to concentrate more in areas which carry more marks. 

 

Electrochemistry may be defined as the branch of chemistry which deals with the quantitative study of interrelation ship between chemical energy and electrical energy and inter-conversion of one form into another.relationships between electrical energy taking place in redox reactions.
A cell is of two types:-
I. Galvanic Cell
II. Electrolytic cell.
In Galvanic cell the chemical energy of a spontaneous redox reaction is converted into electrical work.
In Electrolytic cell electrical energy is used to carry out a non-spontaneous redox reaction.
The Standard Electrode Potential for any electrode dipped in an appropriate solution is defined with respect to standard electrode potential of hydrogen electrode taken as zero. The standard potential of the cell can be obtained by taking the difference of the standard potentials of cathode and anode.
Ecell = Ecathode-Eanode
The standard potential of the cells are related of standard Gibbs energy.
ΔrG=-nFEcell
The standard potential of the cells is related to equilibrium constant.
ΔrG= -RTink
Concentration dependence of the potentials of the electrodes and the cells are given by Nernst equation.
 
CBSE Class 12 Chemistry Electrochemistry Notes and Questions
 
 
 
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