The purpose is to determine the freezing point of cyclohexane and an unknown solute and the
molar mass of the unknown solute.
, lOMoAR cPSD| 48519099
Chemistry Lab Notebook
Procedure 8. Record the final temperature and time.
1. Measure out 10.0 mL cyclohexane (solvent) and Data/Results/Calculations
place into the test tube. Initial temperature: 6.6 C
2. Place a fitted stopper with a wire stir and 30: 6.6 C
thermometer on top of test tube. 120: 7 C
3. Place test tube into a large beaker with ice and salt. 8 minutes: 11.4 C
4. Stir occasionally with wire.
5. Carefully remove the test tube. *Photo
6. Once crystals form, place the test tube onto the
clamp and stand.
7. Take initial temperature and every 30 seconds 10 mL cyclohexane
until it reaches about 11 C. 0.3014 grams of solute
8. Record the final temperature and time.
Initial temperature: 1.4 C
Add solute in with cyclohexane 30: 0.8 C
1. Weigh out solute and record. 60: 0.8 C
2. Add into test tube.
3. Gently swirl until all the solute dissolves. *Photo
4. Place the fitted stopper back on.
5. Place back into the ice bath. 5.8 C difference in temperature depression.
6. Once crystals form, place the test tube onto the
clamp and stand.
7. Take the initial temperature and every 30 seconds
until it reaches about 10 C.
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