Unformatted text preview: ce 500 mL of very hot tap water in a 600 mL beaker and assemble it as a hot-water bath. Clamp
the 6-inch test tube so that it is well immersed in the bath. Heat the water with the burner to
boiling until the naphthalene starts to melt. Once sufficiently melted, turn on the digital
thermometer and place it in the test tube.
4. Shut off the flame once the temperature reaches approximately 90ºC. Carefully agitate the contents
in the test tube with the thermometer until the naphthalene has completely melted. Allow to cool
with the test tube immersed in the hot-water bath.
1 Adapted from Neil Jespersen, General Chemistry & Introduction to General & Organic Chemistry, 14th Ed. John
Wiley & Sons, 2013 – 2014.
Edited by Dr. Ishwar Sadarangani, CHE 1121 Lab Supervisor 5. Once the temperature drops to 85 ºC, start the timer and begin recording the temperature every 2...
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- Spring '14
- Chemistry, René Descartes, Euclidean geometry