3 Repeat for the other per teleting pups How we way 0.10 0.11 of the solute on this Transfer the fint sample is the power 5 Stir until you obtain a lot dead of the decease the temperaturen and the cat is not very at bein completely 9 While Procedure Getting started but will probably ask you to work with a parte 2 Obtain the carding the clohexene solution that you will required for this experiment. It will have been bedsted by your laboratory instructor Make sure the apparatus is clean and dry 5. Rencase the following safety precaution whenever you use welcohere Stir the salation ently but want 7 cool the lation to about and then we bel is intervals . Continue online until the entire but we Remove the apparatus from the beacher and show the who you are waiting voor dat het moothly? If you have a startepelet, t Super faster stirring 10 Add the second sample to the solution. The me the low will now be the combined masses of the first and samples 11. Repeat Stepe 6 through 19. Plot the data for each sample to find the freezing points 13. Calculate each at 14. Calculate the molar mass of the solute from each with dark for significant figures 16. Obtain the mean molar man 16. Share your the class and obtain their movilta Calculate the grand average 17. Calculate the molecular formula of the solute from there are not the empirical formula CH.CH CAUTION: Cyclohexane is flammable. No open flames are allowed during this experiment. ret Measuring the freezing point of cyclohexane 1. Pipet emne 200 ml, of cyclohexane into the apparatus. Close it immedia ately. Evaporation of this volatile substance must be avoided for best results CAUTION: Never use your mouth to draw a liq- uid into the pipet. Use a rubber suction bulb or some other suction device. 2. Calculate and record the mass of cyclohexane Use a density of 0.779, ml. 3. Place the apparatus in a beaker that contains crushed ice and water 4. Stir the cyclohexane gently but constantly 5. After the temperature has dropped to about 14-15C, begin recording the temperature to the nearest 0.1 C every 15 s. A total time of 5-10 min will probably be required 6. After the cyclohexane has frozen and the temperature has begun to de crease again, remove the apparatus from the beaker Allow the cyclohexano to melt completely 7. Repeat Steps 3 through 6. & Pat the data, find the freezing point in each case, and calculate the mean freezing point 9. Sate the cyclohexane for the next part of the experiment, Measuring the freezing points of the solutions 2. Obtain and record the mass of one of these, using your most precise band 1. Ohtain 2 pieces of waxed weighing paper. Mark each one for recognition unce, Place 0.24-0.25 g of the solute directly on the paper. Obtain and record the mass of the paper and solute. Calculate the mass of the solute TOZ A Molar Mass from Freezing-Point Depression Student name: Team members: Mate Course Section: Instructor Prelaboratory assignment 1. Provide definitions for the following terms: a. Solution b. Solute c. Solvent d. Colligative property e. Freezing-point depression 2. a. What is the objective of this experiment? b. How will that objective be achieved? 109 3. A 0.2436-g sample of an unknown substance was dissolved in 20.0 mL of cyclohexane. The density of cyclohexane is 0.779 g/mL. The freezing- point depression was 2.5C. Calculate the molar mass of the unknown substance, 4. What safety rules must be observed during this experiment