Ebulliometer (from lat. ebullire - to boil and Greek. metrein - measure; a synonym for ebullioscope) - a set of methods of determination of physical and chemical variables, based on the measurement of increasing the boiling point solutions (Dt°Kip). The value of Dt°Kip is the difference between the temperatures of boiling solution (temperature) and solvent temperature0: Dt°Kip = t OC temperature0. According to the law Raul for dilute solutions of non-volatile non-electrolytes
Dt°Kip = EU (1)
where - molella concentration of the solution, i.e. the concentration of the solution, expressed in moles of solute per 1000 grams of solvent; E - molecular increase the boiling point, or ebullioscopy constant, the value of which depends on the nature of the solvent and does not depend on the nature of the dissolved substance. For water, for example, it is EH2O=0,52 degrees. For dilute solutions of electrolytes fairly equation
Dt°Kip = IEC (2)
where i is isotonic coefficient (see Osmotic pressure), other values are the same as in equation (1).
In biochemical and clinical laboratories ebulliometer has the same uses as geometria (see), but less accurate due to the difficulties associated with defining the boiling point of liquids.