Introduction
Chapter Name : Chemical Kinetics |
Sub Topic Code : 102_12_04_01_01 |
Topic Name : Introduction |
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Sub Topic Name : Introduction |
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Introduction
Surface chemistry
deals with phenomena that occur at the surfaces or interfaces.
Surface Tension fulfills
an outstanding role in the physical chemistry of the surfaces.
Solubility in
water increases when the number of OH groups within a molecule increases.
Like dissolves
Like, Polar solvent dissolves polar molecule and nonpolar solvent dissolves nonpolar
molecules.
Colloidal particles
are larger than simple molecules but small enough to remain suspended. There
are hydrophilic and hydrophobic colloids
A
micelle is an aggregate of surfactant molecules dispersed in a liquid colloid.
Pre-Requisites:
Surface, Interface
Activity:
A sponge has a large
surface area and therefore can absorb large amount of liquids.
Real Life Question:
How does a sponge absorb water?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Surface tension | Surface tension is when the uppermost layer of molecules sticks to each other. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Sponge | A sponge has pores and holes and therefore has a large surface area for absorption. |
Real life uses :
For absorption, filtration
etc.
Places to visit :
House, cleaning area.
Practical examples around us
| Examples | Explainations |
|---|---|
| Sponge | A sponge has pores and holes and therefore has a large surface area for absorption. |
What you learn in Theory:
Surface chemistry
deals with phenomena that occur at the surfaces or interfaces.
Surface Tension fulfills
an outstanding role in the physical chemistry of the surfaces.
Solubility in
water increases when the number of OH groups within a molecule increases.
Like dissolves
Like, Polar solvent dissolves polar molecule and nonpolar solvent dissolves nonpolar
molecules.
Colloidal
particles are larger than simple molecules but small enough to remain
suspended. There are hydrophilic and hydrophobic colloids.
A
micelle is an aggregate of surfactant molecules dispersed in a liquid colloid.
What you learn in Practice:
Higher surface area means
larger interactions.