Oxidation Reduction
Chapter Name : General Principles And Processes Of Isolation Of Elements |
Sub Topic Code : 102_12_06_07_01 |
Topic Name : Oxidation Reduction |
|
Sub Topic Name : Oxidation Reduction |
|
Introduction
• Some extractions are based on oxidation particularly for non-metals. • A very common example of extraction based on oxidation is the extraction of chlorine from brine. • Electrolysis of molten NaCl is also carried out. But in that case, Na metal is produced and not NaOH. • As studied earlier, extraction of gold and silver involves leaching the metal with CN–. • The metal is later recovered by displacement method. In this reaction zinc acts as a reducing agent.
Pre-Requisites:
Oxidation, reduction, extraction
Activity:
Brine is salty water.
Real Life Question:
How to separate chlorine from a salt solution?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Metallurgy | • Metallurgy is the method involving the extraction of metals from their ores. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Iron rod, Copper wire | All these metals used to make different objects have originally been extracted from their ores. |
Real life uses :
Extraction of gold and silver.
Places to visit :
Garage, kitchen.
Practical examples around us
| Examples | Explainations |
|---|---|
| Brine | • A salt solution can be used to extract chlorine. |
What you learn in Theory:
• Some extractions are based on oxidation particularly for non-metals. • A very common example of extraction based on oxidation is the extraction of chlorine from brine. • Electrolysis of molten NaCl is also carried out. But in that case, Na metal is produced and not NaOH. • As studied earlier, extraction of gold and silver involves leaching the metal with CN–. • The metal is later recovered by displacement method. In this reaction zinc acts as a reducing agent.
What you learn in Practice:
• Metals and non-metals are extracted by electrolysis involving redox reactions.