Halogens

Halogens

1. Reactions with Iron

   • Reaction equation for fluorine
     • Iron+Fluorine-----> Iron(III)fluoride
       • 2Fe + 3F2 --------> 2FeF3

2. Displacement reactions

   • A more reactive halogen can displace a less reactive one in a solution of its own salt
   • Chlorine+Sodium Bromide --------> Bromine + Sodium chloride
     • Cl2 + 2NaBr -----> Br2 + 2NaCl

3. Silver Nitrate Test

   • Halide ions can be identified by their reactions with silver nitrate
   • Chloride, bromide and iodide can be identified by their percipitates with silver nitrate
     • White silver chloride
     • Cream silver bromide
     • Yellow silver iodide
   • Ag+ and Cl- > AgCl
   • Important reaction takes place when the two solutions react is the one between the silver ions and the chloride ions