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19 Οκτ 2016 · Common examples include milk, fog, mayonnaise and paints. Colloids can be classified based on factors like the physical state of the phases, the interaction between the phases, the size and nature of dispersed particles, and the electrical charge on particles.
6 Δεκ 2011 · The document discusses colloids, defining them as heterogeneous mixtures with dispersed particles between 1-100 nm. It classifies different types of colloids based on the state of the dispersed and continuous phases, such as emulsions, foams, sols, and gels.
25 Οκτ 2017 · Colloids demonstrate optical properties like Tyndall effect and can be imaged with electron microscopes. They also exhibit kinetic properties including Brownian motion, diffusion, osmotic pressure, and sedimentation. Colloidal particles are often electrically charged, leading to electrokinetic phenomena like electrophoresis and electroosmosis.
A colloid may be defined as a heterogenous (two phase system consisting of minute particulate of 0.5μm-1nm) substance dispersed into a continuous phase or dispersion medium. Example: Natural colloids: fogs, moist, smoke Ferric hydrosol. 6 Colloidal dispersions.
19 Ιουλ 2014 · COLLOIDAL STATE • Colloids are a type of mixture. It is composed of two phases: • Dispersion medium and dispersed phase. Colloids are the mixtures in which dispersion phase is evenly distributed in the dispersion medium. Colloidal system = Dispersion phase + Dispersion medium.
29 Νοε 2014 · Colloids. Can you name an example of a colloid? Colloids are mixtures with particles intermediate in size between solutions and suspensions (particle size 1 nm to 1000 nm) • You cannot see the individual particles. • The particles do not separate upon standing .
Colloid particles are coagulated (enlarged) until they can be removed by filtration. Methods of coagulation: heating (colloid particles move and are attracted to each other when they collide); adding an electrolyte (neutralize the surface charges on the colloid particles).
