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In colloids, the dispersed substance is not dissolved, but exists in small microscopic packets usually homogeneously dispersed through the medium. A fog, which is small water droplets suspended and evenly dispersed in air, is a colloid
A solution contains a solute dissolved in a solvent, in which each individual molecule is discretely separate from all others in a solvent. The solute will usually ionise to multiple constituent parts. e.g. NaCl in water forming Na+ and Cl-. The solvent may also coordinate around the solute, bonding to it via van der Waals forces.
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What are multimolecular colloids?
when on dispersion of a substance in the dispersion medium a large number of atoms or smaller molecules of substance (diameter less than 1 nm) aggregates together to form species having size in colloidal range, the species thus formed are called as multimolecular colloids. in these colloids the particles are held by weak van der waals forces.
What characteristics are necessary for water dispersal?
To enable water dispersal, a substance should be hydrophilic (attracted to water), have a low surface tension, and form a stable suspension or emulsion in water. Other characteristics may include a small particle size, potential for colloidal stability, and compatibility with the medium in which dispersion is desired.
What factors affect colloids?
Factors that affect colloids include particle size, particle charge, temperature, and presence of electrolytes. These factors influence the stability and behavior of colloidal systems.
What is dispersion time?
Dispersion time refers to the time it takes for a substance to be evenly distributed or dispersed in a liquid. This is important in various industries such as pharmaceuticals, paints, and food processing where uniform dispersion is crucial for product effectiveness. Factors affecting dispersion time include particle size, viscosity of the liquid, and agitation speed.
How is colloid distinguished from a solution or a suspension?
Solution: one phase system (solute or solutes in a solution) Colloid: two phases system, very stable dispersion in a dispersion medium, particles in the range 5-200 nm Suspension: two phases (or more) system, unstable, particles above 200 nm A colloid is distinguished from a solution and a suspension by the particles, because they usually have an electric charge, and they repel each other, so they do not collect into larger perticles that would settle out like those in solutions, and suspensions.
Is smoke solution?
Smoke is a colloidal dispersion. The medium phase for smoke is the air and the particle phase are solid such as dust.
What is a collodial dispersion in chemistry?
An intimate mixture in which small particles are permanently dispersed throughout a solvent. Milk, for example, is a colloidal dispersion of fats, proteins, and milk sugar in water. The suspended particles are intermediate in size between visible particles and individual molecules.
Which colloidal silver generator creates the smallest particle size silver?
The Micro particle colloidal silver generator is currently the most popular generator that produces the smallest particle size silver. It is one method of obtaining pure, therapeutic-quality silver.
What is the difference between dispersed and solubilized?
Dispersion: when any solids particle of very small size i.e. in micrometer are allowed to mixed in any solvent then these particle get dispersed in the solvent. particle do not mixed with the solvent but they are dispersed in the solvent completely and after some time these particle get settle down. eg. of dispersion: dispersion of gas molecule in the air. dispersion of the pigment in solvent. while in solublization process the particle are in nanometer range and they get completely mixed with the solvent . after the solublization process the particle cannot be seperated back from the solvent. eg. solublisation of the drug in the solvent in drug delivery process.etc.
What is dispression method?
Dispersion method is a technique used in chemistry to analyze the distribution of particle sizes in a sample. It involves dispersing the sample in a medium, such as a solvent, and then measuring the size of the particles in the dispersed system. This method is useful for characterizing the physical properties of colloidal systems.
How can distinguish a colloid from a suspension?
the colloidal particle show tyndal effect while suspended particles donot. Colloidal particles donot settle down but the suspended particles get settledown.
What are multimolecular colloids?
when on dispersion of a substance in the dispersion medium a large number of atoms or smaller molecules of substance (diameter less than 1 nm) aggregates together to form species having size in colloidal range, the species thus formed are called as multimolecular colloids. in these colloids the particles are held by weak van der waals forces.
What is colloidal silicon?
Sometimes referred to as a sol or silica sol, colloidal silica consists of a stable dispersion amorphous silica particles. To achieve this, the silica particles must be small enough such that they are largely unaffected by gravity. Therefore, silica particle sizes are usually of the order of less than 100 nanometres. The term colloid refers to the suspension, where the sols are the tiny discrete particles in suspension. Colloidal silica's can be manufactured from materials such as sodium silicate and are usually available in varying concentrations to suit various applications
What are non colloidal soils?
Non-colloidal soils are soils that do not contain clay particles, which are responsible for colloidal properties such as cation exchange capacity and high surface area. These soils typically have larger particle sizes, such as sand and silt, and do not have the ability to hold onto and exchange nutrients and water as effectively as colloidal soils.
What characteristics are necessary for water dispersal?
To enable water dispersal, a substance should be hydrophilic (attracted to water), have a low surface tension, and form a stable suspension or emulsion in water. Other characteristics may include a small particle size, potential for colloidal stability, and compatibility with the medium in which dispersion is desired.
What do you use to filter colloidal particle?
Colloidal particles are typically filtered using techniques such as ultrafiltration or microfiltration, which involve passing the colloidal suspension through a porous membrane to separate the particles based on their size and charge. Other methods like centrifugation or flocculation can also be used to separate colloidal particles from a solution.
How is colloidal silver taken?
Commercially produced products vary greatly in particle size, potency, stability, and contents.
