FLAME TEST LAB REPORT
Kennedy Bretz
Partners: Allison Kepling & Jordan Bucher
09.13.2017
PURPOSE
The purpose of the Flame Test lab is to show, atomic emission, wavelength and energy of the light. Also, to show the excited state vs. ground state, and how the flame tests.
MATERIALS
To begin this lab, the lab group filled a beaker with 250 mL of tap water to be the “rinse beaker”. The metal compounds, distilled water and Q-tips are kept by the teacher. Next set up and light the Bunsen burning, wafting when necessary. The group then wet a Q-tip with the distilled water and coated it in one of the metal compounds: Sodium Chloride, Potassium Carbonate, Calcium Chloride, Strontium Chloride, Copper Chloride or Barium Chloride. Then, the instructor should turn off the lights and one of the members of the group were to insert one of the metal compounds that were on the Q-tip into the hottest part of the flame to record the color of the flame, as the group was finished with that the used Q-tip went into the “rinse beaker”. This procedure was repeated with all seven compounds. As the lab was completed, the lab group turned off the Bunsen burner and washed their hands and also washed and put all the materials away.
DATA T ABLE 1- Flame Test of Known Materials
Cation Tested
Color of Flame
Barium
Yellow
Sodium
Neon Orange
Calcium
Orange- Red
Potassium
Salmon
Strontium
Red
Copper
Teal
Data Table 2- Flame Test of Unknown Materials
Unknown #
Color of Flame
Identity
2
Salmon (Pink Orange)
Calcium
RESULTS TABLE
METAL/FLAME COLOR
ƛ (nm)
ƛ (m)
𝚫E
Barium
Yellow
565 nm
5.65 x 10-7 m
3.51 x 10-19
Sodium
Neon Orange
585 nm
5.85 x 10-7 m
3.37 x 10-19
Calcium
Orange- Red
650 nm
6.5 x 10-7 m
3.04 x 10-19
Potassium
Pink- Orange
590 nm
5.9 x 10-7 m
3.36 x 10-19
Strontium
Red
700 nm
7 x 10-7 m
2.78 x 10-19
Copper
Teal
490 nm
4.9 x 10-7 m
4.04 x 10-19
Calculations
Questions and Problems
(Pre-Lab Questions)
Fill in the blanks: When an atom absorbs energy, the electrons move from their ground state to an excited state. When an atom emits energy, the electrons move from a(n) excited state to their ground state and give light.
What is a metallic ion?
The loosely-held