Hanna HI70960 Preparation solution for solid or semi-solid samples (30mL) that contains a specified concentration of a substance, it is necessary to dissolve the desired number of moles of solute in enough solvent to give the desired final volume of solution. On the basis of physical states of solvent and solute can be categorized as solid, liquid and gaseous solutions. In solid solutions, solute and solvent are in the solid-state. For example ceramics and polymer blends. In liquid solutions, solid, gas or liquid is mixed in a liquid state.