Colloids — Chapter Summary
Telangana Open School (TOSS) · Class 12 · Chemistry
Summary of Colloids for Telangana Open School (TOSS) Class 12 Chemistry. Part of the Telangana Open School (TOSS) Class 12 Chemistry syllabus.
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Overview
Colloids are a special type of mixture where one substance is dispersed as very fine particles in another substance. These particles are larger than those in a true solution but smaller than those in a suspension. Because of their size, colloids appear uniform to the naked eye but are actually heter
Key Concepts
The main difference lies in particle
The main difference lies in particle size. True solutions have particles smaller than 1 nm, colloids have particles between 1–100 nm, and suspensions
Every colloid has two parts
Every colloid has two parts: the dispersed phase (the substance broken into fine particles) and the dispersion medium (the substance in which particle
Depending on the physical state
Depending on the physical state of the dispersed phase and dispersion medium, colloids are classified into eight types like sol, gel, emulsion, aeroso
Lyophilic colloids (solvent
Lyophilic colloids (solvent-loving) like starch in water form easily and are stable. Lyophobic colloids (solvent-hating) like gold sol require special
Colloids show Brownian movement (zig
Colloids show Brownian movement (zig-zag motion due to molecular collisions), Tyndall effect (scattering of light), and carry electric charge which pr
Learning Objectives
- Explain the difference between true solution, colloidal solution, and suspension
- Identify the phases of a colloidal solution
- Classify colloidal solutions based on dispersed and dispersion medium
- Describe methods of preparing colloids
- Explain key properties of colloids such as Brownian movement and Tyndall effect
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Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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