Austin Community College Chemistry
Chem 1111 Pre -Lab Assignment
Flame Tests and Atomic Emission Spectra
Risks present in this lab include (mark ALL that apply):
- The spectrum emission lamps emit ultraviolet radiation, which could damage your eyes if you look directly at the lamp without wearing safety glasses.
- Chemical hazards: acids, bases, or corrosives
- Potential for broken glass: cuts or shards in eyes
- Irritation due to vapors
- Open flames: avoid loose clothing; tie hair back
Rank the following colors of visible light according to increasing energy: Red, Green, Blue
In other words, the color of light that is lowest energy is listed first, and the color of light that is highest in energy is listed last.
The most intense line in the emission spectrum for sodium appears at a wavelength of 589 nm. What color would you expect to observe when a solution that contains sodium ions is heated strongly in the flame of a Bunsen burner?
Calculate the energy (in joules) associated with light having a wavelength of 589 nm. Planck's constant h = 6.626x10⁻³⁴ J · s
Calculate the frequency, in s⁻¹ (cycles per second) associated with light having a wavelength of 589 nm. The speed of light is 3.00 x 10⁸ m/s.
Complete the statement below by circling the appropriate word from the choices provided
When an electron moves from a (lower, higher) energy state to a (lower, higher) energy state, (absorption, emission) occurs, and the sign of delta E is negative