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Unformatted text preview: solution. Remove the
microspatula and insert the thermometer.
10. When the temperature of the solution drops to 85°C, start the timer and record the temperature
every 20 seconds until you have reached the freezing point of the naphthalene-sulfur solution. This
is indicated by six (6) constant temperature measurements. REMINDER! For optimum
measurements, stir the solution constantly with the thermometer for a few seconds before
recording the temperature.
11. Reheat the water bath until the naphthalene-sulfur has melted completely. Shut off the flame;
carefully take out the thermometer and clean it as directed by your instructor. Remove the test tube
from the water bath and cool it to room temperature. Once the contents of the test tube have
solidified completely, discard the ENTIRE test tube in the designated waste...
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This document was uploaded on 02/23/2014 for the course CHEMISTRY 1121L at St. Johns Duplicate.
- Spring '14