Chemistry - Reactions of Halide Ions

Chemistry - Reactions of Halide Ions

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The Reactions of the Halogens
FluorineChlorine Bromine Iodine
Oxidation of a halide ion by a halogen
F- Cl- Br- I-
/ Yes Yes Yes
F2
No / Yes Yes
Cl2
No No / Yes
Br2
No No No /
I2
Remember OIL RIG (Oxidation Is Loss, Reduction Is Gain)
This table shows how well halogens can cause halide ions to lose electrons (oxidising the ions)

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The Reactions of the Halogens
The reactions of sodium halides with conc. sulfuric acid
Sodium Chloride (solid)
Drops of conc. acid added to the solid.
Hydrogen Chloride is produced - steamy fumes.
Solid produced - sodium hydrogensulfate
NaCl (s) + H2SO4 (l) -> NaHSO4 (s) + HCl (g)
(Not a redox reaction, no oxidation states have changed. Chloride ion too weak a reducing agent to
reduce the sulfur in sulfuric acid.…read more

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The Reactions of the Halogens
Identifying metal halides with silver ions
All metal halides (except fluorides - precipitate is soluble) react with silver ions in aqueous solution,
for example in silver nitrate, to form a precipitate of the insoluble silver halide.…read more

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