Hazards:
Methlene chloride is toxic.
Chlorine water and bromine water are corrosive and toxic.
Chemicals and Solutions:
0.1M KCl
0.1M KBr
0.1M KI
Chlorine water
Bromine water
Iodine water
Methylene chloride
Materials:
Three ringstands
Six 250 mL separatory funnels with stoppers
Six rings
Procedure:
Perform the following reactions in the separatory funnels, and extract each reaction mixture with methylene chloride in order to see the characteristic color of the halogen.
Cl2(g) + 2Br-(aq) è Br2(g)+ 2Cl-
Cl2(g) +2I-(aq) è I2(g) + 2Cl-
Br2(g) +2I-(aq) è I2(g) + 2Br-
Br2(g) +2Cl-(aq) è no reaction
I2(g) +2Br-(aq) è no reaction
I2(g) +2Cl-(aq) è no reaction
To schedule a demonstration, please send an email to the demonstration lab.
Contact:
Eric Camp
Lecture Demonstration Technician
Bagley Hall 171
(206) 543-1606