Unit 1: Study Area 3 - Solutions (page 43 to page 46) 

Solutions form when one substance (solute) dissolves in another substance (solvent) and they end up in the same state. Solutions are therefore homogeneous. There are a number of different types of solutions and we have already investigated alloys which are a solid state solution. Other solutions include air (gas state) and saline (salt in water). We will investigate solutions that form in the liquid state.