VALIDATION OF THE EXPERIMENTAL DISTRIBUTION MEASURED PHYSICAL QUANTITY CLOSE TO THE NORMAL DISTRIBUTION
In the course of performing the practical work on molecular physics were obtained is not quite usual results, with the result that it was decided to conduct an experiment with greater precision in order to refute or confirm the initial data. In this work, we investigated the dependence of dynamic viscosity of aqueous solutions of ethanol from various concentrations at a temperature of 25?°C. The results of measurements built by the graph of dependence of viscosity on concentration. In the area of concentration of ethanol ~ 50?% of the detected maximum of the investigated dependence. The experimental results were compared with data of other authors for similar solutions. Attempts to explain its origin by the fact that at these concentrations the molecules form orderly and fairly stable complexes. In the field of high concentrate alcohol is the embedding of water molecules in the own structure of the alcohol. Built-in linear water-spirit associates of the water molecules legated adjacent cross chain hydrogen bonds, which is manifested, in particular, the viscosity increase by adding to the alcohol already small amounts of water. We can also assume that the water molecule are looped at their ends about three or four chains of alcohol molecules In water-alcohol mixtures the most significant contribution to the formation of complexes of molecules contribute to the specific properties of the water solvent, namely, the formation of hydrogen bonds between molecules of water and alcohol.