Solute:In a homogeneous solution, the solute is the substance that gets dissolved. For example, in saltwater, salt is the solute.
Solvent:The solvent is the substance that does the dissolving in a homogeneous solution. In saltwater, water is the solvent.
Concentration:Concentration refers to how much solute is present in a given amount of solvent or solution. It can be expressed as moles per liter (M) or mass/volume percent (%).