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Unformatted text preview: 10. Make sure the thermometer is not resting on the bottom or touching the sides of the test tube 11. When all the naphthalene has melted, stop heating 12. Remove the tube with the stopper assembly in place 13. Put it into a large beaker that has a paper towel in it 14. Record T readings every 30 sec until it resolidifies 15. Stir constantly OMIT PROCEDURE B (Sulfur) Procedure C: Determination of the Molar Mass of an Unknown 1. Replace test tube of naphthalene into water bath 2. Heat until melted 3. Using weighing paper weigh about 2g of an unknown 4. Remove the stopper form the test tube 5. Do not lose any of the naphthalene 6. Add the unknown to test tube 7. Replace the stopper and stir gently until all the unknown has dissolved 8. Remove from water bath 9. Dry the test tube 10. Place the test tube a large beaker that has a paper towel in it 11. Record T readings as before until the sample solidifies (stir constantly)...
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This note was uploaded on 05/01/2011 for the course CHEM 112 taught by Professor Hibbard during the Spring '08 term at Spelman.
- Spring '08