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The mixtures differ from pure substances, such as elements and compounds, in that they contain different substances that mix physically but not chemically. The individual components of a combination retain their unique identity.

Ahomogeneous mixtureis a mixture that exhibit auniform or same composition throughout. Since the dissolved salt is evenly distributed in the saltwater sample, the saltwater described above is homogeneous. The difference between a pure substance and a homogeneous mixture is that the composition of the substance is always the same. The salinity in saltwater varies from sample to sample.

Since the solute is present in the same amount throughout the solution, all solutions are said to be homogeneous.

A heterogeneous mixture is a mixture in which composition is not uniform or not same throughout the mixture. Vegetable soup is a varied preparation. Each soup bite contains different proportions of the different vegetables and other components of the soup. A phase is any part of a sample with consistent composition and properties. A heterogeneous mixture has at least phases.

A homogeneous mixture is a mixture exhibiting auniform compositionthroughout.
One would think that all solutions are homogeneous.
A heterogeneous mixture is one in which thecomposition is not same or uniform throughout the mixture. In a heterogeneous mixture, a phase is a distinct layer.