_Experiment14 - dissolves. Note any changes in temperature....

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Date Performed: Experiment 14 Solubility and Heats of Solution I. Objectives -to explore the solubility of several solutes in different solvents. II. Diagrams/Figures for Special Set-ups: None for this expt. III Outline/Schematic Diagram of Procedure.: 1. Solubility (Effect of Solute and Solvent) a. Pipet 0.50 mL each of dH2O, ethyl alcohol and toluene in 3 separate test tubes. To each soln, add a pinch of NaCl. Shake test tube & let it stand. Observe & record results as soluble or insoluble. b. Pipet 0.50 mL each of dH2O, ethyl alcohol, and toluene in 3 separate test tubes. TO each soln, add a drop of glycerol. Shake the test tube and let it stand. Observe and record results as miscible or immiscible. c. Pipet 0.50 mL dH2O into 2 separate test tubes. To each test tube, add a small iodine crystal then shake. To 1 soln, add a drop of KI and shake. Compare the colors of the solns and record your observation. Place 1 mL dH2O into a test tube. Add NH4Cl into each test tube until no more salt
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Unformatted text preview: dissolves. Note any changes in temperature. Heat the mixture gently & observe what happens. 3. Heat and Volume Changes. a. Pipet 5 mL water into a 10 mL volumetric flask (dapat CLEAN and DRY). Fill the rest of the flask to mark with methanol. Cover and shake to mix the 2 liquids. Note the changes in temperature and final volume of the solution. b. Pipet 5 mL ethanol into a 10 mL volumetric flask. Fill the rest w/ acetone (to mark). Cover and shake to mix the 2 liquids. Note the changes in temp and final volume of the soln. c. Pipet 5 mL of methanol into a 10 mL volumetric flask. Fill the rest w/ ethanol (to mark). Cover and shake to mix. Note changes in temp and final volume of soln. IV. Special Notes: 1. organic solvent Organic waste (inc glycerol and naphthalene) 2. inorganic solns flush down sink. Dilute before flushing when needed. V. Tabulation of Data:...
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This note was uploaded on 08/11/2008 for the course CHEM 16 taught by Professor Siao during the Fall '07 term at University of the Philippines Diliman.

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