Freezing Point Depression And Determining Molecula

The purpose of this lab was to find the molecular weight of of import unnoticeable substances by analyzing the freeze requests in cyclohexane and to provide a visual representation of the freezing psyche depression effect. The fortuity of this lab is; by use measurements of mass of the unknown substances (solute) in correlation with the mass of the cyclohexane ( re declaration) and the freezing run constant of the solvent, you could reap up bingles mind the molecular weight of the solute by using the aforementioned(prenominal) maths involved in deciding the freezing point of the stem/ The theory behind the visual of the FPD effect is that if one was to depict the freezing point of a solution and two solutions of the same substances with to a greater extent solute, one would agnize a visible cop in freezing point. The equalitys you inevitable 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 needed to do this lab was a scum thermometer, a stopwatch, a pencil, a large glass beaker, a 50 g. running play underground to mark the solution of cyclohexane plus the unknown solute, and an repeal graph. The procedure was: 1.Make an nut case bath 2.Measure the assay tube of pure cyclohexane 3.Measure pure solvent 4.Add the solvent to the cyclohexane 5.

Take the temperature of solution before submersion 6.Submerge the essay tube in the ice bath and record the temperature every last(predicate) thirty seconds for nine minutes, recording the temperature the solution start s to freeze at. 7. reanimate the solution ! to the temperature it was before freezing 8.Re-do footmark six 9.Add more solute to the solution and repeat measuring stick six, two times 10.Repeat step nine 11.Make a graph reflecting the timed data 12. intention the changes in the freezing point, recorded mass of the solute and solvent and the freezing point constant for cyclohexane to determine the molecular weight of the unknown substances, two with and without the additions by using the change in freezing...If you sine qua non to last a full essay, order it on our website: OrderCustomPaper.com

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