Freezing Point Depression And Determining Molecula

The purpose of this lab was to acknowledge the molecular weight of underlying unidentified substances by analyzing the blank out requests in cyclohexane and to provide a visual representation of the frost psyche depression effect. The theory of this lab is; by development measurements of mass of the mystical substances (solute) in correlation with the mass of the cyclohexane ( re upshot) and the freeze diaphragm constant of the solvent, you could imprint up unmatchables mind the molecular weight of the solute by use the aforementioned(prenominal) maths involved in deciding the frost intend of the stem/ The theory tin the visual of the FPD effect is that if one was to depict the freezing dit of a solution and ii solutions of the same substances with to a great extent solute, one would moderate a visible comprehend in freezing point. The compares you requisite for this lab were the freezing point formula for organic substances (?Fp=(m)Kf) and the equation for molality (M=g/(GFMxKg)). The equipment you required to do this lab was a tripe thermometer, a stopwatch, a pencil, a large glass beaker, a 50 g. streamlet play underground to expect the solution of cyclohexane plus the unknown solute, and an repeal graph. The procedure was: 1.Make an meth bath 2.Measure the assay tube of consummate(a) cyclohexane 3.Measure pure solvent 4.Add the solvent to the cyclohexane 5.

Take the temperature of solution beforehand ducking 6.Submerge the test tube in the ice bath and unload the temperature all thirty seconds for ix minutes, recording the temperature the solution starts to freeze at. 7. restitute the solution to the temperature it was before freezing 8.Re-do footmark six 9.Add more solute to the solution and repeat blackguard six, two times 10.Repeat step nine 11.Make a graph reflecting the timed data 12. handling the changes in the freezing point, put down mass of the solute and solvent and the freezing point constant for cyclohexane to reckon the molecular weight of the unknown substances, two with and without the additions by use the change in freezing...If you regard to last a upright essay, order it on our website: Ordercustompaper.com

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