Redox Reactions In Terms Of Electron Transfer Reactions
Chapter Name : Redox Reactions |
Sub Topic Code : 102_11_08_02_01 |
Topic Name : Redox Reactions In Terms Of Electron Transfer Reactions |
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Sub Topic Name : Introduction |
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Introduction
Redox reactions include all chemical reactions in which atoms have their oxidation state changed.
Pre-Requisites:
Redox reaction, oxidation, reduction
Activity:
Electroplating: The process of electroplating uses redox reactions to coat objects with a thin layer of a material, as in chrome-plated automotive parts.
Real Life Question:
What is galvanization?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Oxidation | Oxidation is the loss of electrons or an increase in oxidation state by a molecule, atom, or ion. |
| Reduction | Reduction is the gain of electrons or a decrease in oxidation state by a molecule, atom, or ion. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Daniell cell | In the Daniell cell, copper and zinc electrodes are immersed in a solution of copper (II) sulfate and zinc sulfate respectively. At the anode, zinc is oxidized. At the cathode, copper is reduced. |
Real life uses :
• Protecting metals from corrosion. • Purifying metals (e.g. Al, Na, Li).
Places to visit :
Chemistry lab.
Practical examples around us
| Examples | Explainations |
|---|---|
| Cellular respiration | Cellular respiration, for instance, is the oxidation of glucose (C6H12O6) to CO2 and the reduction of oxygen to water. The summary equation for cell respiration is: C6H12O6 + 6 O2 ? 6 CO2 + 6 H2O |
What you learn in Theory:
• The term “oxidation” is defined as the addition of oxygen/electronegative element to a substance or removal of hydrogen/ electropo . • The term “Reduction” is defined as the removal of oxygen/electronegative element from a substance or addition of hydrogen/ electropositive element to a substance.
What you learn in Practice:
The redox reactions are a family of reactions that are concerned with the transfer of electrons between species. The term comes from the two concepts of reduction and oxidation.