CBSE Class 12 Chemistry Electrochemistry Chapter Notes

Download CBSE Class 12 Chemistry Electrochemistry Chapter Notes in PDF format. All Revision notes for Class 12 Chemistry have been designed as per the latest syllabus and updated chapters given in your textbook for Chemistry in Class 12. Our teachers have designed these concept notes for the benefit of Class 12 students. You should use these chapter wise notes for revision on daily basis. These study notes can also be used for learning each chapter and its important and difficult topics or revision just before your exams to help you get better scores in upcoming examinations, You can also use Printable notes for Class 12 Chemistry for faster revision of difficult topics and get higher rank. After reading these notes also refer to MCQ questions for Class 12 Chemistry given on studiestoday

Revision Notes for Class 12 Chemistry Unit 03 Electrochemistry

Class 12 Chemistry students should refer to the following concepts and notes for Unit 03 Electrochemistry in Class 12. These exam notes for Class 12 Chemistry will be very useful for upcoming class tests and examinations and help you to score good marks

Unit 03 Electrochemistry Notes Class 12 Chemistry

 Chemistry

Ch:3 Electrochemistry

Key Learnings

1. Oxidation is defined as a loss of electrons while reduction is defined as a gain of electrons.

2. In a redox reaction, both oxidation and reduction reaction takes place simultaneously.

3. Direct redox reaction: In a direct redox reaction, both oxidation and reduction reactions take place in the same vessel. Chemical energy is converted to heat energy in a direct redox reaction.

4. Indirect redox reaction: In indirect redox reactions, oxidation and reduction take place in different vessels. In an indirect redox reaction, chemical energy is converted into electrical energy.

5. In an indirect redox reaction, the device which converts chemical energy into electrical energy is known as an electrochemical cell.

6. In an electrochemical cell:

a. The half cell in which oxidation takes place is known as oxidation half cell

b. The half cell in which reduction takes place is known as reduction half cell.

c. Oxidation takes place at anode which is negatively charged and reduction takes place at cathode which is positively charged.

d. Transfer of electrons takes place from anode to cathode while electric current flows in the opposite direction.

e. An electrode is made by dipping the metal plate into the electrolytic solution of its soluble salt.

f. A salt bridge is a U shaped tube containing an inert electrolyte in agar-agar and gelatine.

7. A salt bridge maintains electrical neutrality and allows the flow of electric current by completing the electrical circuit.

8. Representation of an electrochemical cell:

a. Anode is written on the left while the cathode is written on the right.

b. Anode represents the oxidation half cell and is written as: Metal/Metal ion (Concentration)

c. Cathode represents the reduction half cell and is written as: Metal ion (Concentration)/Metal

d. Salt bridge is indicated by placing double vertical lines between the anode and the cathode

e. Electrode potential is the potential difference that develops between the electrode and its electrolyte. The separation of charges at the equilibrium state results in the potential difference between the metal and the solution of its ions. It is the measure of tendency of an electrode in the half cell to lose or gain electrons. 

9. When the concentration of all the species involved in a half cell is unity, then the electrode potential is known as standard electrode potential. It is denoted as EΘ.

10. According to the present convention, standard reduction potentials are now called standard electrode potential.

11. There are 2 types of electrode potentials: Oxidation potential and reduction potential.

12. Oxidation potential is the tendency of an electrode to lose electrons or get oxidized.

13. Reduction potential is the tendency of an electrode to gain electrons or get reduced.

14. Oxidation potential is the reverse of reduction potential.

15. The electrode having a higher reduction potential has a higher tendency to gain electrons. So, it acts as a cathode.

16. The electrode having a lower reduction potential acts as an anode.

17. The standard electrode potential of an electrode cannot be measured in isolation.

18. According to convention, the Standard Hydrogen Electrode is taken as a reference electrode and it is assigned a zero potential at all temperatures.

19. Standard calomel electrode can also be used as a reference electrode.

20. Standard hydrogen electrode consists of a platinum wire sealed in a glass tube and carrying a platinum foil at one end. The electrode is placed in a beaker containing an aqueous solution of an acid having 1 Molar concentration of hydrogen ions. Hydrogen gas at 1 bar pressure is continuously bubbled through the solution at 298 K. The oxidation or reduction takes place at the Platinum foil. The standard hydrogen electrode can act as both anode and cathode.

If the standard hydrogen electrode acts as an anode: H2 (g) → 2H+ (aq) + 2e-

If the standard hydrogen electrode acts as a cathode: 2H+ (aq) + 2e-→ H2 (g)

21. In the electrochemical series, various elements are arranged as per their standard reduction potential values.

22. A substance with higher reduction potential value means that it has a higher tendency to get reduced. So, it acts as a good oxidising agent.

23. A substance with lower reduction potential value means that it has a higher tendency to get oxidised. So, it acts as a good reducing agent.

24. The electrode with higher reduction potential acts as a cathode while the electrode with a lower reduction potential acts as an anode.

25. The potential difference between the 2 electrodes of a galvanic cell is called cell potential and is measured in Volts.

26. The cell potential is the difference between the reduction potential of cathode and anode. 

E cell = E cathode – E anode
 
Cell potential is called the electromotive force of the cell (EMF) when no current is drawn through the cell.
 
27. Nernst studied the variation of electrode potential of an electrode with temperature and concentration of electrolyte.
 
28. Nernst formulated a relationship between standard electrode potential Eө and electrode potential E. 
E = Eө - 2.303RT/nF log 1/  [Mn+
E = Eө - 0.059 /n  log 1/  [Mn+ ] (At 298 K) 

29. Electrode potential increases with increase in the concentration of the electrolyte and decrease in temperature. 

30. Nernst equation when applied to a cell: 
Ecell = Eөcell - 2.303RT/nF log [Anode ion]/[Cathode ion] 
This helps in calculating the cell potential 

31. At equilibrium, cell potential Ecell becomes zero 

32. Relationship between equilibrium constant Kc and standard cell potential Eө cell : 
Eө cell =  0.059/n logK(At 298 K) 

33. Work done by an electrochemical cell is equal to the decrease in Gibbs energy 
ΔGө = -nFEө cell 

34. The substances which allow the passage of electricity through them are known as conductors. 

35. Every conducting material offers some obstruction to the flow of electricity which is called resistance. It is denoted by R and is measured in ohm.


Please click the link below to download pdf file for CBSE Class 12 Chemistry - Electrochemistry Chapter Notes

z More Study Material for Class 12 Chemistry
Class 12 Chemistry Full Study Material For Boards Revision

CBSE Class 12 Chemistry Unit 03 Electrochemistry Notes

We hope you liked the above notes for topic Unit 03 Electrochemistry which has been designed as per the latest syllabus for Class 12 Chemistry released by CBSE. Students of Class 12 should download and practice the above notes for Class 12 Chemistry regularly. All revision notes have been designed for Chemistry by referring to the most important topics which the students should learn to get better marks in examinations. Studiestoday is the best website for Class 12 students to download all latest study material.

Notes for Chemistry CBSE Class 12 Unit 03 Electrochemistry

Our team of expert teachers have referred to the NCERT book for Class 12 Chemistry to design the Chemistry Class 12 notes. If you read the concepts and revision notes for one chapter daily, students will get higher marks in Class 12 exams this year. Daily revision of Chemistry course notes and related study material will help you to have a better understanding of all concepts and also clear all your doubts. You can download all Revision notes for Class 12 Chemistry also from www.studiestoday.com absolutely free of cost in Pdf format. After reading the notes which have been developed as per the latest books also refer to the NCERT solutions for Class 12 Chemistry provided by our teachers

Unit 03 Electrochemistry Notes for Chemistry CBSE Class 12

All revision class notes given above for Class 12 Chemistry have been developed as per the latest curriculum and books issued for the current academic year. The students of Class 12 can rest assured that the best teachers have designed the notes of Chemistry so that you are able to revise the entire syllabus if you download and read them carefully. We have also provided a lot of MCQ questions for Class 12 Chemistry in the notes so that you can learn the concepts and also solve questions relating to the topics. All study material for Class 12 Chemistry students have been given on studiestoday.

Unit 03 Electrochemistry CBSE Class 12 Chemistry Notes

Regular notes reading helps to build a more comprehensive understanding of Unit 03 Electrochemistry concepts. notes play a crucial role in understanding Unit 03 Electrochemistry in CBSE Class 12. Students can download all the notes, worksheets, assignments, and practice papers of the same chapter in Class 12 Chemistry in Pdf format. You can print them or read them online on your computer or mobile.

Notes for CBSE Chemistry Class 12 Unit 03 Electrochemistry

CBSE Class 12 Chemistry latest books have been used for writing the above notes. If you have exams then you should revise all concepts relating to Unit 03 Electrochemistry by taking out a print and keeping them with you. We have also provided a lot of Worksheets for Class 12 Chemistry which you can use to further make yourself stronger in Chemistry

Where can I download latest CBSE Class 12 Chemistry Unit 03 Electrochemistry notes

You can download notes for Class 12 Chemistry Unit 03 Electrochemistry for latest academic session from StudiesToday.com

Can I download the Notes for Unit 03 Electrochemistry Class 12 Chemistry in Pdf format

Yes, you can click on the link above and download notes PDFs for Class 12 Chemistry Unit 03 Electrochemistry which you can use for daily revision

Are the revision notes available for Unit 03 Electrochemistry Class 12 Chemistry for the latest CBSE academic session

Yes, the notes issued for Class 12 Chemistry Unit 03 Electrochemistry have been made available here for latest CBSE session

How can I download the Unit 03 Electrochemistry Class 12 Chemistry Notes pdf

You can easily access the link above and download the Class 12 Notes for Chemistry Unit 03 Electrochemistry for each topic in Pdf

Is there any charge for the Class 12 Chemistry Unit 03 Electrochemistry notes

There is no charge for the notes for CBSE Class 12 Chemistry Unit 03 Electrochemistry, you can download everything free of charge

Which is the best online platform to find notes for Unit 03 Electrochemistry Class 12 Chemistry

www.studiestoday.com is the best website from which you can download latest notes for Unit 03 Electrochemistry Chemistry Class 12

Where can I find topic-wise notes for Class 12 Chemistry Unit 03 Electrochemistry

Come to StudiesToday.com to get best quality topic wise notes for Class 12 Chemistry Unit 03 Electrochemistry

Can I get latest Unit 03 Electrochemistry Class 12 Chemistry revision notes as per CBSE syllabus

We have provided all notes for each topic of Class 12 Chemistry Unit 03 Electrochemistry as per latest CBSE syllabus