Octadecanoic Acid
Problem:
What is the Melting point of Octadecanoic Acid (Stearic Acid)?
Procedure:
1. Mass out 2 grams of Octadecanoic Acid and place in a large test tube.
2. Set up a water bath.
3. Slowly heat the water bath and take the temperature every 30 seconds until all acid is melted.
4. Add ice to the beaker and take the temperature every 30 seconds until the liquid freezes.
Safety Notes:
1. Wear safety goggles during the entire lab.
2. Wear an apron.
3. Do not burn yourself.
Picture:
Draw a diagram of the kaboratory activity and label all parts of the setup.
Date Tables: Graph Data
Time every 30 seconds Temperature every 30 seconds
1st time being heated
1st time being solidified
2nd Time being heated
Conclusion:
1. What’s the structural formula for Stearic Acid?
2. Graph the theoretical and experimental data
3. From the graph paper, determine the melting and freezing points.