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 often called the universal solvent because it dissolves so many materials. A major property of water is that it is a polar molecule. This property is due to how the compound water forms. The oxygen end has a slight negative charge and the hydrogen end has a slight positive charge. The positive end of a water molecule is attracted to the negative end of another water molecule.