My lab report for my Chemistry I class in NWRHS.

1. Chemistry I Lab – Boiling Point of a Solution
Allan D. Boswell
01 April 2012
B4

2. The purpose of this lab was to determine which antifreeze solution was most effective for
protection against boiling. The two antifreeze products in question were Prestone and Super-
Tech. Overall, Prestone seemed to be the best protection against boiling compared to Super-
Tech, while only five percent of the solution of Prestone was best used against boiling. Ideally,
while priced at $11.99 per gallon, Prestone surely had “more bang for the buck” compared to the
latter Super-Tech, being priced at $11.79 per gallon. Antifreeze is used to increase the boiling
point within a coolant system, typically found inside automobiles. For instance, say it was
freezing outside and one would fear his or her radiator system would supposedly freeze
overnight, causing problems for his or her automobile in the latter run; antifreeze would be the
perfect way to increase the heat within that system to protect the system from freezing in the first
place. Not only that, however, but antifreeze also can be used to reduce heat within the radiator
system, or even to prevent rust from the engine due to frequent exposure to water. Too much of a
concentration of an antifreeze solution will cause problems for the engine, causing one to shed
bucks just to replace the engine itself. In extreme heat, having too much of the concentration
would just cause the water within the system to heat up even more, while using too little of the
solution during freezing temperatures will result in the water freezing.

3. 112
110 0%
108 5%
106 10%
104 15%
102 20%
100 25%
98
30%
96
35%
94
40%
Super Tech Prestone

4. 1: What specific property of water would make it a good coolant, looking at the data?
After looking at the data, the regular property of water (H2O) would be the most effective
as a coolant.
2: How do comparable amounts of antifreeze and Isopropyl alcohol differ in the
temperature as the time progresses?
The antifreeze heats faster as time progresses rather than the Isopropyl alcohol.
3: The chemical formula for ethylene glycol (antifreeze) is C2H6O2 and Isopropyl alcohol is
C3H7OH. Calculate the new boiling point and freezing points for 1000.0 grams of aqueous
solution (total volume), that is 30.0% solute (the antifreeze and the alcohol are the solutes).
You will calculate the boiling and freezing points for BOTH ethylene glycol and Isopropyl
alcohol in water. That means you will have four answers to this question.