Physical Properties
Chapter Name : Aldehydes, Ketones And Carboxylic Acids |
Sub Topic Code : 102_12_12_08_01 |
Topic Name : Physical Properties |
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Sub Topic Name : Physical Properties |
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Introduction
A carboxylic acid is an organic acid characterized by the presence of at least one carboxyl group.
Pre-Requisites:
Carboxylic acid
Activity:
Ketones.
Real Life Question:
What is carboxylic acid?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| carboxylic acid | A carboxylic acid is an organic acid characterized by the presence of at least one carboxyl group. |
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:
Carboxylic acids are polar because they are both hydrogen-bond acceptors (the carbonyl) and hydrogen-bond donors (the hydroxyl), they also participate in hydrogen bonding.
What you learn in Practice:
Carboxylic acids tend to have higher boiling points than water, not only because of their increased surface area, but because of their tendency to form stabilized dimers.