Colligative Proprties jdenuno依数性质 jdenuno.docVIP

Name ______________________________________ Before you begin, save this Lab Report Template on your computer as LastNameAPChem4b Title: Colligative Properties Purpose: to investigate the colligative properties of solutions Materials: water carbon tetrachloride chloroform benzene carbon disulfide ethyl ether sucrose sodium chloride calcium chloride sulfur hot water bath cold water bath thermometer /group/Greenbowe/sections/projectfolder/flashfiles/propOfSoln/colligative.html Procedure: Go to the website above. Follow instructions for investigating the colligative properties of solutions. Select solvent and leave mass at default value of 100 g. Select solute and set mass (see data tables, below) Select hot or cold bath Click Start Record boiling or freezing temperatures of the solution.(Be patient…wait for the temperature to stabilize. Record the highest temperature reached!) Calculate boiling point elevation and freezing point depression for 20.0 g of each solute. Results: See Data Tables below, below Discussion: Summarize what you did and describe your results making specific reference to your data. Report specific values for boiling point elevation and freezing point depression for one solute in each solution. Indicate sources of error. Suggest improvements in the experimental design. Conclusion: Testable statement about colligative properties. Reflection: Personal statement about what you learned from this lab. Data Table 1: Boiling Point Elevation and Freezing Point Depression of 100 g Water with Various Solutes Boiling Point = ______ oC Freezing Point = ______ oC Kb = _____ oC-kg/mol Kf = _____ oC-kg/mol Mass of Solute (g) Solute Sucrose (C12H22O11) Sodium Chloride (NaCl) Calcium Chloride (CaCl2) Sulfur (S8) Boiling Point (oC) Freezing Point (oC) Boiling Point (oC) Freezing Point (oC) Boiling Point (oC) Freezing Point (oC) Boiling Point (oC) Freezing Point (oC) 0.