A solution of salt and water is transparent and appears uniform because salt dissolves completely in water, forming a homogeneous mixture. In contrast, a mixture of salt and oil does not form a solution. Salt does not dissolve in oil, and they will remain as separate components with oil floating on top of the salt. Here's a more detailed breakdown:Salt and Water:When salt (sodium chloride) is added to water, it dissolves, meaning the salt crystals break down into individual ions (sodium and chloride) that are evenly dispersed among the water molecules. This creates a homogeneous mixture, where the salt is no longer visible as separate particles and the solution looks clear and uniform. Salt and Oil:When salt is added to oil, it does not dissolve. The oil molecules, being nonpolar, do not interact strongly with the polar salt ions. The salt will settle to the bottom, forming a heterogeneous mixture where you can clearly see the salt particles and the oil layer.