Table 1. Criteria C, the color of the flames as observed
Compound Metal Flame Color Wavelength
CaCl2 Calcium Orange 680
CuCl2 Copper Green and Light Blue 480
LiCl Lithium Red/Pink 740
NaCl Sodium Light Orange 660
BaCl2 Barium Yellow/Green 580
SrCl2 Strontium Red/Orange 700
KCl Potassium Light Purple 400
Unknown 1 Barium Yellow/Green 580
Unknown 2 Strontium Red/Orange 700
Conclusions and evaluations
1. The flame test experiment was not testing for chlorine ions but the metal in the metal chloride. This is because, when both the metal and chlorine are heated, only the metal produces visible light.
2. Chlorine emits energy that is not in the visible portion of the spectrum. The different metals produced different colors of flames due to their characteristic behavior of emitting distinctive visible parts of the spectrum. Each metal has its unique flame color
3. The distinctive color is formed when electrons from the heated metal get excited and leave their energy level. In their process of returning, they settle in a lower energy level emitting visible energy inform of a portion of the spectrum. That is what gives the flame of the metal a color.
4. When the compounds are arranged according to the energy released, they were as follows;
3) Unknown 2
7) Unknown 1
5. The flame of the unknown compounds I and 2 as observers was yellow/green and red/orange respectively. According to what we learned earlier, these kinds of flames are only exhibited by Barium and Strontium respectively. This is due to their distinctive flam colors they produce when they are heated. The two unknown compounds are
• Unknown 1: Barium .This is because the flame burnt with Yellow/green flame.
• Unknown 2: Strontium. This is because the flame burned with a Red/orange flame.
6. The flame test as a method of identifying the type of metals are there in a salt cannot be used to I identify a compound with many metals. This is because the type and color of the flame that will be displayed will have a variety of colors that will be very technical to distinguish. Most of the colors of the flames are best decided when they are observed in singularity. It might be difficult to distinguish the flame color of metals that have flame colors that are close to one another in the spectrum.
7. The major sources of errors in this experiment result from the positioning of the sample on the flame. When the sample is places in the region that is not visible, it will prevent observation of the crucial clues that are being investigate.
The other errors may arise from the environmental conditions at the laboratory during the time of caring out the experiment. When there is excess moisture in the air this is going to affect the whole experiment. This is because, some of the elements might want to react with the water molecules in the area which would drastically alter the result of the experiment.