Physical Properties
Chapter Name : Aldehydes, Ketones And Carboxylic Acids |
Sub Topic Code : 102_12_12_03_01 |
Topic Name : Physical Properties |
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Sub Topic Name : Physical Properties |
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Introduction
Aldehydes and ketones are widespread in nature, often combined with other functional groups.
Pre-Requisites:
Aldehydes and Ketones.
Activity:
Aldehydes and Ketones.
Real Life Question:
What are Aldehydes?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Aldehydes and ketones | Aldehydes and ketones are simple compounds which contain a carbonyl group - a carbon-oxygen double bond. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Aldehydes and Ketones | Aldehydes and ketones are widespread in nature, often combined with other functional groups. |
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" (pronounced own, not won) 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:
Boiling points: Methanal is a gas (boiling point -21°C), and ethanal has a boiling point of +21°C. That means that ethanal boils at close to room temperature.
What you learn in Practice:
The reason for the solubility is that although aldehydes and ketones can't hydrogen bond with themselves, they can hydrogen bond with water molecules.