CHM 1025C Module 1 Sample Name: ________________
Module 1: Part F The Control Experiment demonstrating the Scientific Method
I performed the following experiment.
1. I dissolved 0.50 gram of the following salts in 20 mL of water.
Test tube one: Calcium chloride plus water
Test tube two: Sodium chloride plus water
Test Tube three: Potassium Chloride plus water
Test Tube four: Barium chloride plus water
2. I lit a Bunsen burner, and cleaned a flame testing wire ( a metal wire with a small loop
on the end inserted in a wooden handle) using a strong acid, like Nitric acid.
3. When the wire no longer displayed a color in the blue flame of the burner after dipping
in the acid, I tested each solution by dipping the wire in the solution and immersing it
into the flame of the Bunsen burner.
(Between each substance tested, I cleaned the wire in the same manner until no
visible flame appeared.)
A movie may be watch of two of the four tests at
(needs Apple quick time movie to play .mov file):
1. The Calcium chloride solution burned with a brick red flame
2. The Sodium Chloride burned with yellow slightly orange color
Note: it took 10 times the cleaning process to rid the yellow color from the wire
3. The Potassium chloride burned with a violet (lilac) color
4. The Barium chloride burned with a greenish slightly yellow flame.
Did I use any controls in my procedure, if so what were they?
How would you suggest additional testing/experimentation and is there enough evidence from this test to make a hypothesis? A theory?