![]() Emulsions exhibit all of the properties of a colloidal solution, including Brownian movement, Tyndall effect, and electrophoresis.These systems have a translucent appearance because the particle size is less than 100 nm. This attribute arises from the fact that light waves are only scattered by droplets whose diameters exceed one-quarter of the wavelength of the incident light. The system appears translucent in colour when particular kinds of emulsions, such as nano-emulsions and micro-emulsions, are used. ![]() The colour will be warped to substantially longer wavelengths and seem more yellow if the emulsion is concentrated enough. The “Tyndall Effect” is the name given to this phenomenon. Low-wavelength light is dispersed more in dilute emulsions, causing the emulsion to look blue in colour. When all light is distributed evenly, emulsions appear white. The emulsion’s colour is determined by its concentration. Because the phase interphases present in the emulsion scatter light at different wavelengths, the emulsions have a hazy look. The interface is a border that exists between the dispersed and continuous phases. Relationship Between Concentration and Appearance If this makes the emulsion electrically conducting, then water is the dispersion medium. Conductivity test: Add a small amount of an electrolyte (Example: KCl) to the emulsion.If the oil isn’t diluted, it functions as a dispersion medium, and the result is a water-in-oil emulsion. If the emulsion can be diluted with water, water serves as the dispersion medium, and the emulsion is an oil-in-water emulsion. Dilution test: To the emulsion, add water.A water-in-oil type is one in which the entire background is coloured. It is an oil-in-water type emulsion if colour is visible while gazing at a drop of the emulsion. ![]()
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