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Lab 13: Freezing Point Depression: A Colligative Property of SolutionsLab Partners: Purpose:The purpose of this experiment is to determine the freezing point of Cyclohexane and other various solutions of cyclohexane with the solute, naphthalene. Students will observe the effects of a solute on freezing point as well as determine the molar mass of an unknown substance.Data Analysis I: Determining the Freezing Point of Solutions from Freezing Curves05010015020025030035040045066.577.588.599.51010.5Figure 1: Freezing Curve for Pure CyclohexaneTime (sec)Temperature (°C)Figure 1: Pure Cyclohexane Freezing Curve
01002003004005006005678910Figure 2: Freezing Curve for Solution 1Time (sec)Temperature (°C)Figure 2: Solution 1- 3.99g naphthalene in 1 L of Cyclohexane
Figure 3: Solution 2- 3.99g naphthalene in 500mL of Cyclohexane010020030040050060034567891011Figure 3: Freezing Curve for Solution 2Time (sec)Temperature (°C)
Figure 4: Solution 3- 5.99g naphthalene in 500mL of Cyclohexane
010020030040050012345678910Figure 5: Freezing Curve for Solution 4Time (sec)