Solution a homogeneous mixture of two or more substances. Concentration states how much solute is contained in a given volume or mass of solution/solvent. Molarity (m) the # of moles of a substance per liter of solution (1l= 10^-3 m^3) Atomic mass # of grams containing avogadro"s number. Molecular mass sum of atomic masses (g/mol) Electrolyte substance that dissociates into ions in solution. Formal concentration (f) molarity of a strong electrolyte. Formula mass (fm) molecular mass of a strong electrolyte. Molality (m) concentration as moles of substance per kilogram of solvent ; independent of temperature. Wt% = mass of solute/ mass of total solution or mixture * 100. Volume percent (vol%) = volume of solute / volume of total solution * 100. To prepare soln with desired molarity, weigh out correct mass of reagent and dissolve in a volumetric flask. Volumetric analysis procedures in which we measure the volume of reagent needed to react with analyte.