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Difference between Homogeneous and Heterogeneous Mixtures

Main Difference

Mixture is basically a combination of two or more than two pure substances, each substance retains its own chemical properties. A mixture can be homogenous which has uniform composition or heterogeneous which has non-uniform composition. A homogenous mixture is a mixture where all substance are of same nature and consists of similar parts. Heterogeneous mixtures are made up of two or more totally different substances.

Homogenous Mixtures

homogeneous-mixturesHomogenous mixtures are made up of uniform composition in which particles are distributed equally and uniformly. Homogenous mixtures have same amount of various constituents throughout the given sample. The individual parts in a homogeneous mixture in not easily identifiable. Homogenous mixture can also be called as solutions. For example. When we dissolve teaspoonful of table salt into a glass of water it makes a homogenous mixture. Table salt when fully dissolved in water is nearly impossible to separate and the particles of salt cannot be easily seen. Homogenous mixtures can also be made up of solid substances like steel which is basically a mixture of iron metal and carbon dioxide. When homogenous mixture involve metals they are referred as alloys. No matter what the amount of homogenous mixture you took, the quantity of the different substance always occur in a same ratio. Homogenous mixtures can also be made up of gases. For example; the air we breathe in consist of different gases but we cannot pick out the individual particles from the air.  The means that homogenous mixtures do not have physically distinct parts.

Heterogeneous Mixture

heterogeneous-mixturesHeterogeneous mixtures are made up of different constituents which are not mixed uniformly and are not distributed equally. Heterogeneous mixtures have unequal amount of various substances throughout the given sample. Particles in a heterogeneous mixture are easily identifiable and are easily separable. Heterogeneous mixtures are termed as suspensions or colloid.  For example; if you add sand in a bucket of water and try to dissolve it makes a heterogeneous mixture because the sand will not form mixture no matter how much sand you take to dissolve it in water, its particles can be easily separated through chemical or physical means. The properties of both sand and water will not change because in heterogeneous mixtures the substance maintains their individual properties. Heterogeneous mixture can also be made up of two different liquids like oil and water which forms emulsion. In a heterogeneous mixture the quantity of the different substances do not occur in a same ratio. The substances present in a heterogeneous mixture maintains their own physical properties. Few more examples of heterogeneous mixtures are: aerosol, smog, milk of magnesia, etc.

Key Differences

  • Homogenous mixtures are made up of uniform composition where particles are distributes equally while heterogeneous mixtures are made up of non-uniform composition where particles are not distributed equally
  • The substances dissolved in a homogenous mixture are not easily identifiable while in heterogeneous mixture the substances are easily identifiable.
  • The substances dissolved in homogenous mixture cannot be easily separated where as in heterogeneous mixture the substances can be easily separated through chemical or physical means.
  • Homogenous mixture are known as solutions while heterogeneous mixtures are termed as suspension or colloid.
  • In Homogenous mixtures the substances dissolved do not maintain their own individual properties while in heterogeneous mixtures the substances maintains their own individual properties.

Video Explanation

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