Freezing Point

Experiment 1 Freezing take down Depression of Electrolytes Colligative properties are properties of solutions that nix on the concentrations of the samples and, to a foremost approximation, do not aim on the chemical character of the samples. A colligative property is the difference amidst a property of a solvent in a solution and the same property of the unadulterated solvent: vapor crush lowering, boiling bakshis elevation, check point economic crisis, and osmotic ram. We are delightful for the frost point depression of aqueous solutions of ethylene glycol or propylene glycol in the winter and are continually grateful to osmotic pressure for transport of water across membranes. Colligative properties have been used to determine the molecular(a) weights of non-electrolytes. Colligative properties can be envision reasonably well by a simple comparability for solutions of non-electrolytes. The abnormal colligative properties of electrolyte solutions supported the Arrhenius surmise of ionization. Deviations from ideal behavior for electrolyte solutions drop dead to the determination of activity coefficients and the exploitation of the theory of interionic attractions.

The equation for the frost point depression of a solution of a non-electrolyte as a function of molality is a very simple esthesis (as you may remember from GEN CHEM): ? TF = K F m (1) The constant KF, the halt point depression constant, is a property only of the solvent, as given by the following equation, whose derivation is available in many physical chemistry texts1: ( ) o 2 MW(Solvent)R TF KF = 1000 ? H F (2) In equation (2), R is the swash constant in J/K*mol, TFo is the halt point of the solvent (K), ?HF is the heat of partnership of the solvent in J/mol, and the factor of 1000 is needful to convert from g to kg of water for molality. For water, KF = 1.860 o/molal from the properties of pure water and from experimental data on the freezing point depressions of dilute...If you want to seize a full essay, particularize it on our website: Ordercustompaper.com

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