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11.2- The Chemical Reactions Of The Halogens

Trends in oxidising ability

Halogens usually react by gaining electrons to become negative ions, with
a charge of -1. The makes the reactions REDOX; halogens are oxidising
agents and are themselves reduced. For example:

Cl2 + 2e- 2Cl-

The oxidising ability of the…

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The extraction of bromine from seawater

The oxidation of a halide by a halogen is the
basis of a method for extracting bromine
from seawater. Seawater contains small
amounts of bromide ions, which can be
oxidised by chlorine to produce bromine, as
in the reaction discussed before and shown


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