CHM 1301 Chapter Notes -Dunne D.1, Pasteur Pipette, Spectrophotometry

• School: University of Ottawa
• Department: Chemistry
• Course: CHM 1301
• Professor: Francis Loiseau

Document Summary

Concepts and techniques to review: colour theory, use of a spectrophotometer. Introduction: this experiment involves the combination of ferric nitrate and oxalic acid to form a ferrioxalate which undergoes a photochemical reaction when it is introduced to light which produces ferrous ions. A second solution of potassium ferricyanide is then prepared and added to the ferrioxalate solution. The substance will be tested using different colours and exposure times, the ferrioxalate will then be examined by spectrophotometery to discover what colours of light it absorbs. Purpose: in this experiment we will examine the properties of photosensitive solutions such as sensitivity to light as well as heat. 1205ml erlenmeyer flask: medium-sized test tubes, hot plate/magnetic stirrer, petri dishes, paper, white flood light, red flood light, test tube rack, potassium ferricyanide. 4. (this step must be done in the dark), soak all four pieces of paper in the ferrioxalate solution for 2-3 minutes, dry papers in the vacuum filtration unit.