More on the Halogens
ObjectivesBe able to...•Recall how to test for the presence of
halides using silver nitrate•Explain the storage and transport risks
associated •Describe a range of uses of the halogens
Specification...Where this comes from...
Reactions with Silver Nitrate
Can you suggest a use for the silver halides?
Which silver halide precipitate is formed most quickly?
How is AgNO3 used to test for halide ions?
HalideColour of
precipitateFormula of precipitate
Solubility in ammonia
Fluoride no ppt. no ppt. soluble
Chloride white AgCl soluble
Bromide cream AgBr partially soluble
Iodide yellow AgI insoluble
Uses of Fluorine
Fluorine, often via hydrogen fluoride, is used to manufacture many other products.
Fluorineand its
compounds
Processing uranium
nuclear fuel Fluoridation of water
Toothpaste,to prevent tooth
decay
fluorine-containing polymers, e.g. Teflon
Uses of Chlorine
pesticides and weed killer
Drinking water treatment
Chlorineand its compounds
HCl
Bleach to kill bacteriaand to make paper
white
antiseptics and disinfectants
Chlorinatedcarbon compounds,
e.g.solvents and plastics
(PVC)
Uses of Bromine and Iodine
Iodine and its compounds
Bromineand its
compounds
medicines
antiseptic
Leaded petrol(being phased
out)
agriculture
photography
Animal feed supplements
Transport issuesUse storylines books