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MS FARZANA MEHBOOB D.A.NEELUM HIGH SCHOOL

MS FARZANA MEHBOOB D.A.NEELUM HIGH SCHOOL. Instructional Lesson on ELECTROCHEMISTRY. Overview. Electrochemistry introduction Cell &Batteries. Electrolysis & its Application. ELECTROCHEMISTRY. FARADAY. DANIELL. F O U N D E R S. From Wikipedia. is a. Branch of Chemistry.

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MS FARZANA MEHBOOB D.A.NEELUM HIGH SCHOOL

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  1. MS FARZANA MEHBOOB D.A.NEELUM HIGH SCHOOL Instructional Lesson on ELECTROCHEMISTRY

  2. Overview • Electrochemistry • introduction • Cell &Batteries Electrolysis & its Application

  3. ELECTROCHEMISTRY FARADAY DANIELL F O U N D E R S From Wikipedia

  4. is a Branch of Chemistry involves also called Redox reactions generate cause OR

  5. CONCEPT MAP REDOX REACTIONS

  6. A redox reaction can be divided into two Half Reactions: • an oxidation reaction • a reduction reaction. • The loss of electrons is called oxidation, • The gain of electrons is reduction. REDUCING OXIDIZING AGENT AGENT

  7. This can be easily remembered through: OIL, Oxidation Is Loss, RIG, Reduction Is Gain “ An OIL RIG"

  8. Oxidation-Reduction Reactions OXIDATION = loss of electrons Examples: Examples: Na  Na+ + e- Al  Al3+ + 3e- S2- S + 2e- Na  Na+ + e- Al  Al3+ + 3e- S2- S + 2e- OXIDATION = increasing the oxidation number (more positive) Example: NO  NO2 Oxid. Nos: +2 -2 +4 -2 change = +2 +2 to +4 : N is oxidized

  9. OXIDATION-REDUCTION REACTIONS Direct Redox Reaction Oxidizing and reducing agents in direct contact. Cu(s) + 2 Ag+(aq) ---> Cu2+(aq) + 2 Ag(s)

  10. OXIDATION-REDUCTION REACTIONS Indirect Redox Reaction A battery Oxidizing and reducing agents are not in direct contact

  11. Why do reduction-oxidation reactions occur? It is all about energy.  Reduction and = an analogous flow oxidation of electrons. The energy of a chemical system drives the charges to move. E

  12. CONCEPT MAP OF GALVANIC CELL used to convert into are in simplest form in which has also called

  13. Parts of a Galvanic cell • Two electrodes of different metals • Electrolyte • An electrical wire • A salt bridge

  14. Cathode compartment • The compartment in which reduction occurs.  • The reaction at the cathode: Cu2+(aq)  +  2e- --->  Cu (s) Cathode electrode Cu Electrolyte (CuSO4)

  15. Anode compartment anode electrode Zn Electrolyte (ZnSO4) The compartment in which oxidation occurs The reaction at the anode : • Zn (s)  --->Zn2+ (aq)  +  2e-

  16. Story ofAn Ox&Red Cat

  17. Story ofAn OxRed Cat ANodeOXidation AND NEGATIVE DANIEL ANODE REDuction CAThode

  18. WHAT IS ELECTROLYSIS

  19. TYPES OF ELECTROLYTE

  20. GENERAL TERMS USED IN ELECTROLYSIS Electrolytic cell It has three component parts: • An electrolyte • Two electrodes (a cathode and an anode). • A battery

  21. VIDEO OF ELECTROLYSIS

  22. Industrial Application of electrolysis

  23. Electrolysis of molten Alumina

  24. VIDEO

  25. Gold plating external power source external power source Au Au Au+(aq) Au+(aq) cathode: Au+(aq) +e-→Au anode: Au→Au+(aq) +e-

  26. VIDEO COPPER REFINING

  27. SUMMARY

  28. Concept Map

  29. The End

  30. PRESENTER MS FARZANA MEHBOOB D.A.Neelum High School

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