Homogeneous mixtures are very well mixed. Solutions are homogeneous mixtures. In a solution one substance is dissolved in another. The particles in a solution are atoms, ions, or molecules. The particles are obviously too small to be seen and will not separate out on standing.
Solutions have two parts.
Water is a solvent which can dissolve 1,000s of substances. Water is often called the universal solvent because it dissolves so many materials. Water is a polar molecule. The oxygen end has a slightly negative charge and the hydrogen end has a slightly positive charge. The positive end of a water molecule is attracted to the negative end of another water molecule.