Qualitative Analysis Of Organic Compounds
Chapter Name : Organic Chemistry - Some Basic Principles And Techniques |
Sub Topic Code : 102_11_12_09_04 |
Topic Name : Qualitative Analysis Of Organic Compounds |
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Sub Topic Name : Test For Halogens |
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Introduction
Organic chemistry is a chemistry sub discipline involving the scientific study of the structure, properties, and reactions of organic compounds and organic materials, i.e., matter in its various forms that contain carbon atoms.
Pre-Requisites:
Organic chemistry
Activity:
Aromatic compounds.
Real Life Question:
What is organic chemistry?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Gas chromatography | Gas chromatography (GC), is a common type of chromatography used in analytical chemistry for separating and analyzing compounds that can be vaporized without decomposition. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Alcohols | Alcohols (R-OH) take the suffix "-ol" with an infix numerical bonding position: CH3CH2CH2OH is propan-1-ol. The suffixes -diol, -triol, -tetraol, etc., are used for multiple -OH groups: Ethylene glycol CH2OHCH2OH is ethane-1, 2-diol. |
Real life uses :
Study the nature of chemicals.
Places to visit :
Chemistry laboratory.
Practical examples around us
| Examples | Explainations |
|---|---|
| ketones | In general ketones (R-CO-R) take the suffix "-one" with an infix position number: CH3CH2CH2COCH3 is pentan-2-one. If a higher precedence suffix is in use, the prefix "oxo-" is used: CH3CH2CH2COCH2CHO is 3-oxohexanal. |
What you learn in Theory:
If a clean copper wire in contact with a halogen-containing compound is placed in a flame, the presence of halogen is revealed by a green to blue color. An organic compound will usually ignite. This should not be interpreted as either a positive or negative test.
What you learn in Practice:
Halogens present in an organic compound forms sodium halide on fusion with sodium metal. Sodium halide extracted with water can be easily identified by adding silver nitrate solution after acidifying with dil. HNO3.