1. Chemical Info. Search Exp
Chemical Info. Search Exp. 12: Atomic Spectra Concentration Units and Calculations
CHE116

2. Purpose of These Experiments
To practice finding/using chemical information on the Internet. (Chemical Info. assignment)
To observe atomic emission lines
To use various concentration units and practice calculations
CHE116

3. Chemical Information Search
Use any or all of the websites shown to you to complete the chemical info. search assignment
SigmaAldrich website:
Flinn Scientific website:
Wikipedia (good for CAS numbers):
National Institute of Standards and Technology:
OSHA Occupational Chemical Database:
CHE116

4. Exp. 12
Use the spectroscope and lamps to observe and record the emission lines of hydrogen and helium
CHE116

5. Concentration Units and Calculations
No chemicals are involved with this work
Several different concentration units are discussed, and several calculation problems for each concentration unit are included in the CHE116 supplement
Complete as many calculations for each unit as possible during lab; complete the rest outside of lab class
CHE116