1. III. METHODOLOGY
In doing this experiment, we are to determine the boiling point of our assigned
liquid sample and the softening and melting point of benzoic acid. The assigned liquid
sample to our group is Isopropyl alcohol. We first place 2 mL of Isopropyl alcohol in a
test tube. By using a cork, we are able to position the thermometer an inch above the
liquid sample in the test tube. The next thing we do was to heat the test tube in a glycerol
bath until the Isopropyl alcohol brings to boil. When the liquid sample starts to boil, we
then look for the temperature in the thermometer. After collecting the boiling point of the
Isopropyl alcohol, its time to determine the softening and melting point of benzoic acid.
We first filled the capillary tube with the benzoic acid and closed one end of the capillary
tube using a luminous flame. We then tied the capillary tube at the tip of the thermometer
using a thread then placed the thermometer an inch above the boiling glycerol bath and
waited for it to soften and melt. When it started to soften, we collected the temperature on
the thermometer and it’s the same thing we did after it melted.
