postlab2 - 6. Describe the procedure for inspecting,...

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Post-Laboratory Assignment for Chemistry 116 Lab Date: 2/21/08 Name: James Anders Section: 17 Room: 206 Score: _________ TA: Ed Torres 1. In your own words, distinguish between solute and solvent (4 points). A solute is chemical that can be dissolved into a solvent. A solute would be salt and a solvent would be water. 2. In your own words, distinguish between volatile and non-volatile substances (4 points). Volatile substances would lower the boiling point of a solution and a non volatile substance would not lower the boiling point of a solution. 3. What is the molality of a solution that contains 6.0g urea (molecular weight = 60 amu) in 250g benzene (4 points)? .40 m 4. Calculate the freezing point of a solution containing 7.50g of benzene in 60g of chloroform (4 points). -71.69 degrees Celcius 5. What is the molar mass of urea if the freezing point of a solution containing 15g of urea in 100g of acetic acid is 6.85 C (4 points)? 60 g/mol
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Unformatted text preview: 6. Describe the procedure for inspecting, lighting, using, turning off, and storing a Bunsen Burner (4 points). Make sure there are no holes in the tube connecting the gas and burner, use a flint striker to light the burner when the gas is turned on, turn the gas off to turn the burner off. The TA should store and set up the burner. 7. What are the dangers and safety precautions of using naphthalene (2 points)? a Bunsen Burner (2 points)? Naphthalene is very flammable and using it around a burner is dangerous. 8. List three colligative properties and suggest a rationale for the choice of the word colligative to describe these properties (6 points). Concentration, Solute, and Solvent 9. What effect does the presence of a non-volatile solute have on a) the vapor pressure of a solution, b) the freezing point, and c) the boiling point (6 points)? It has little to no effect on a, b, or c....
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This note was uploaded on 04/08/2008 for the course CHEM 116 taught by Professor Torres during the Spring '08 term at Ole Miss.

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postlab2 - 6. Describe the procedure for inspecting,...

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