Mixtures Facts

Mixtures Facts
Mixtures, different from chemical compounds, are a combination of two or more different components that are not chemically combined. Therefore, they retain their original chemical and physical identities when joined.
Interesting Mixtures Facts:
Mixtures can be combined either as solutions, suspensions, or colloids.
Likewise, mixtures can be either homogeneous or heterogeneous.
In a homogeneous mixture, the make up is uniform and every constituent of the mixture has the same properties.
In a heterogeneous mixture, the various components are visible since there are different phases taking place among the parts.
Air would be an example of a homogeneous mixture, while sand and water would be an example of a heterogeneous mixture.
A solution would occur when there is only one phase present in the components, making it a homogeneous mixture.
In this case, a solute (substance) is completely dissolved in another substance, the solvent.
A suspensions would be a heterogeneous mixture with different phases present, and there are solid particles that allow sedimentation or build-up to occur.
Suspensions will eventually allow the solid particles to settle, which can then be redistributed upon mechanical agitation.
A colloid can be either homogeneous or heterogeneous, but the size of the solid particles that are distributed through the other component will indicate its status as a colloid.
Unlike suspensions, the solid state particles in a colloid will not settle, but due to their microscopic size will remain distributed throughout the substance.
The Tyndall effect describes the reasoning behind some colloids appearing translucent, as light is scattered by the solid particles.
Colloids were studied extensively by Scottish scientist Thomas Graham, which led to the fields of study related to interface and colloid science.
Despite the fact that the constituent components are still able to retain their chemical and physical properties when they become a mixture, their properties might be slightly altered as a whole. This means the melting point of the mixture, for example, might be different than the melting points of each component alone.
Many times but not always, a mixture can be physically separated through a process in order to select out the constituent components.
Azeotropes are mixtures that cannot readily be separated after forming the mixture.

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