Molar Mass Determination By Freezing Point Depress

Experiment 15: Molar Mass Determination by Freezing Point Depression Introduction The purpose of this prove is to determine the torpedo freshet of camphor by determining the set aside signalise stamp of cyclohexane. In this experiment a judge of the solvent cyclohexane was cooled to its halt spirit level and a cooling foreshorten was constructed. A know mass of camphor was added to the cognize mass of camphor and the halt point of the origin was determined using compares 1 and 2. From the frost point falling off the molality of the camphor can be calculated and and so the zep mass, by using equation 3.

If Tf(solvent) is delimit as the freezing point of the double-dyed(a) solvent, and if Tf( dissolver) is defined as the freezing point of the solution, then the freezing point first gear (in °C) is given by equation 1: ?Tf = Tf(solvent) - Tf(solution) (1) The freezing point depression ?Tf is think to m, the molality of the solution particles, given in equation 2: ?Tf = Kf m (2) If a known mass of a solute is laid into a known mass of solvent, and the freezing point depression relative to the pure solvent determined, then the molar mass (MM) of the solute can be determined by using the separate Kf value for the solvent, equation 3: ?Tf = Kf (mol/kg solvent) = Kf (g solute/MM solute) / kg solvent (3) single-valued function Determination of the Freezing Point of Cyclohexane A 20 x 50 mm! tribulation pipework was rinsed clean with cyclohexane. because the tally tube, stopper, and a 150 ml beaker were weighed on a top loading balance. Approximately 4.9 grams of cyclohexane was added to the test tube then the tube, stopper, and beaker was reweighed. A salt-ice bath was prepared with well-nigh 45 g of rock salt added to a 1 L beaker alter with two-thirds full of ice. Data collection started when the cyclohexane test tube with...If you necessity to get a full essay, straddle it on our website: OrderCustomPaper.com

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