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Questions and Answers
How are soil colloids observed?
How are soil colloids observed?
What is the size of soil colloids?
What is the size of soil colloids?
What is the total surface area of soil colloids?
What is the total surface area of soil colloids?
What gives rise to an ionic double layer in soil colloids?
What gives rise to an ionic double layer in soil colloids?
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What do soil colloids attract on their surfaces?
What do soil colloids attract on their surfaces?
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Study Notes
Observing Soil Colloids
- Soil colloids are observed using techniques such as electron microscopy, centrifugation, and chromatography.
Characteristics of Soil Colloids
- The size of soil colloids ranges from 1-1000 nanometers (nm) in diameter.
Surface Area of Soil Colloids
- The total surface area of soil colloids is very large due to their small size.
Ionic Double Layer in Soil Colloids
- The ionic double layer in soil colloids is formed when the colloid surface reacts with ions in the surrounding solution, creating a layer of opposite charge.
Attraction on Soil Colloid Surfaces
- Soil colloids attract and hold ions, water, and organic compounds on their surfaces through electrostatic forces, hydrogen bonding, and van der Waals interactions.
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Description
Learn about the general properties of soil colloids, including their small size and colloidal nature. Understand the characteristics of clay fraction and the specific size range of particles with colloidal properties.