Refining
Chapter Name : General Principles And Processes Of Isolation Of Elements |
Sub Topic Code : 102_12_06_08_01 |
Topic Name : Refining |
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Sub Topic Name : Refining |
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Introduction
• A metal extracted by any method is usually contaminated with some impurity. • For obtaining metals of high purity, several techniques are used depending upon the differences in properties of the metal and the impurity. E.g. distillation, liquation, electrolysis, zone refining etc.
Pre-Requisites:
Extraction, impurity
Activity:
Some gold jewelry may have different shades due to the purity differences.
Real Life Question:
How do we get pure metals from impure ones?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Refining | • Removal of impurity. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Jewellery, copper vessels | Some gold jewelry may have different shades due to the purity differences. |
Real life uses :
Purification of gold and silver.
Places to visit :
Jewelers shop, utensil shop.
Practical examples around us
| Examples | Explainations |
|---|---|
| Gold jewelry | Some gold jewelry may have different shades due to the purity differences. |
What you learn in Theory:
• A metal extracted by any method is usually contaminated with some impurity. • For obtaining metals of high purity, several techniques are used depending upon the differences in properties of the metal and the impurity. E.g. distillation, liquation, electrolysis, zone refining etc.
What you learn in Practice:
• Refining is done to remove impurity.