A mixture is a physical combination of two or more substances in which the substances retain their individual chemical properties. The composition of a mixture can vary, and the components can be separated by physical means, such as filtration or distillation. Examples of mixtures include salt water, sand and water, and air.

A solution is a homogeneous mixture in which the solute (the substance being dissolved) is evenly distributed throughout the solvent (the substance doing the dissolving). The solute and solvent interact at the molecular level, and the solution has uniform properties throughout. Examples of solutions include sugar dissolved in water, salt dissolved in water, and alcohol dissolved in water.

The main difference between a mixture and a solution is the level of homogeneity. Mixtures are not homogeneous, while solutions are. This difference can be seen in the following table:

| Property | Mixture | Solution |

|---|---|---|

| Homogeneity | Not homogeneous | Homogeneous |

| Composition | Can vary | Uniform |

| Separation | Components can be separated by physical means | Components cannot be separated by physical means |

| Examples | Salt water, sand and water, air | Sugar dissolved in water, salt dissolved in water, alcohol dissolved in water |

In addition to homogeneity, there are other differences between mixtures and solutions. For example, mixtures can be heterogeneous or homogeneous, while solutions are always homogeneous. Mixtures can also be separated into their components by physical means, while solutions cannot. Finally, mixtures can have a variable composition, while solutions have a uniform composition.