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Pre-Laboratory Assignment 1. A student performed the freezing point depression experiment and obtained the following data: - Mass of test tube and stir rod =35.223g - Mass of test tube, stir rod and unknown 36.837g - Mass of test tube, stir rod, unknown, and water =56.984g - Freezing point data for water and an unknown solution is given in the table below: a. Plot the temperature time data for the experiments on the same Excel plot and attach the Excel plot along with the data table. b. Labcl the graph appropriately as shown in the introduction. c. Specify the freczing points of water (Tf+)and the unknown solution (Tj) on the graph. 4. From the graph determine the freezing point of Pure Water: Unknown Solution: e. Calculate the freezing point depression of the solution [TT fm f. Calculate the molality of the solution (m) Calculate the molar mass of the unknown