Relative to thin solution For example, there is no clear definition, which is generally agreed. For example, sulfuric acid below 70% is often considered as dilute sulphuric acid Concentrated solution and dilute solution are relative
For example, some substances solubility If it is very small, its saturated solution is a concentrated solution compared with its unsaturated solution, but it is more soluble than other solutions material Compared with the dilute solution Concentration dilution relationship
『1』 solution The concentration and dilution of is only related to the ratio of solute and solution mass, but not to the solution temperature, solute and solvent type. 『2』 Dilute solution is relative to concentrated solution
『3』 Concentrated solution 、 dilute solution And Saturated solution 、 Unsaturated solution It is a solution described from different angles, and there is no necessary connection between them. 『4』 Under the same conditions, for the same substance, the saturated solution is thicker than the unsaturated solution. This sentence is right.
『5』 The saturated solution is not necessarily a concentrated solution, and the unsaturated solution is not necessarily a dilute solution.
The concentrated solution is not necessarily a saturated solution, and the dilute solution is not necessarily an unsaturated solution.
『6』 In saturated solution solute not always solubility It is very large, so the solution it forms may not be very thick, and it is also unsaturated solution The solubility is not necessarily very small, so the unsaturated solution is not necessarily very dilute. 
