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

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

Chemical Information Search Use any or all of the websites shown to you to complete the chemical info. search assignment SigmaAldrich website: http://www.sigmaaldrich.com/united-states.html Flinn Scientific website: http://www.flinnsci.com/msds-search.aspx   Wikipedia (good for CAS numbers): https://www.wikipedia.org/ National Institute of Standards and Technology: http://webbook.nist.gov/chemistry/ OSHA Occupational Chemical Database: http://www.osha.gov/chemicaldata/index.html CHE116

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

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