What is a Homogeneous Mixture?
Homogeneous mixtures are defined as mixtures that cannot be told apart by eye or with optical instruments and that show a homogeneous structure like a single phase, thanks to the even distribution of their components. In mixtures of this kind every point has the same properties and the same composition, and the dispersed substances are present at the same concentration everywhere in the mixture.
Properties of Homogeneous Mixtures:
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A sample taken from any point in the mixture has the same composition and concentration.
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Its components cannot be seen by eye or with optical instruments.
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It appears as a single phase.
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It is also called a solution.
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Homogeneous mixtures can be separated by methods such as filtration, centrifugation or evaporation.
Examples of Homogeneous Mixtures:
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Salt water
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Sugar water
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Air
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Alcohol
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Vinegar
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Metal alloys
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Glass
Industrial Application Areas of Homogeneous Mixtures:
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Food Industry: Homogeneous mixtures give food products an even structure and extend their shelf life. Fruit juices, sauces, mayonnaise and ice cream are all homogeneous mixtures.
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Pharmaceutical Industry: Homogeneous mixtures allow drugs to be produced effectively and safely. The active components of a drug are distributed evenly and so produce the intended effect in the body.
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Chemical Industry: Homogeneous mixtures are used in producing and processing chemical products and raw materials. Paints, varnishes, detergents and fertilizers, for instance, are homogeneous mixtures.
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Cosmetics Industry: Homogeneous mixtures give cosmetic products an even structure and let them be absorbed easily by the skin. Creams, lotions, foundations and masks are further examples.
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Mining Industry: Homogeneous mixtures are used in separating valuable metals and minerals from ores. Flotation, for instance, is a method in which homogeneous mixtures are used.
Homogeneous Mixtures by Size:
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True solutions: Solutions in which the molecules of the components are smaller than 1 nanometer (nm). Salt water and sugar water, for instance, are true solutions.
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Colloids: Solutions in which the molecules of the components are between 1 nm and 1,000 nm. Fog and smoke, for instance, are colloids.
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Suspensions: Solutions in which the components are larger than 1,000 nm. Sandy water and floury water, for instance, are suspensions.
Homogeneous Mixtures by Concentration:
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Dilute solutions: Solutions in which the concentration of the dissolved substance is low. Lemonade, for instance, is a dilute solution.
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Concentrated solutions: Solutions in which the concentration of the dissolved substance is high. Sea water, for instance, is a concentrated solution.
Separation of Homogeneous Mixtures:
Homogeneous mixtures can be separated by methods such as filtration, centrifugation or evaporation.
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Filtration: Used to separate solid and liquid phases.
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Centrifugation: Used to separate liquid phases of differing density.
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Evaporation: Used to separate the liquid phase from the solid phase.
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Author:
Industrial Design Engineer