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Chemical mechanism of the bromine explosion. The blue area at the bottom represents the condensed phase (liquid brine or ice surface). Tropospheric ozone depletion events are phenomena that reduce the concentration of ozone in the earth's troposphere.
Inorganic bromine is found in the atmosphere and is quickly cycled between its gas and its particulate phase. Bromine gas (Br 2 ) undergoes an autocatalytic cycle known as the ' bromine explosion ', which occurs in the ocean and salt lakes such as the Dead Sea , where a high quantity of salts are exposed to the atmosphere.
Industrially, it is mainly produced by the reaction of hydrogen gas with bromine gas at 200–400 °C with a platinum catalyst. However, reduction of bromine with red phosphorus is a more practical way to produce hydrogen bromide in the laboratory: [39] 2 P + 6 H 2 O + 3 Br 2 → 6 HBr + 2 H 3 PO 3 H 3 PO 3 + H 2 O + Br 2 → 2 HBr + H 3 PO 4
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The German command opted to employ chemical warfare, using chlorine and bromine gases to flush out the Russian defenders and ensure an easy capture of the fortress. By late July 1915, 30 gas artillery batteries had been deployed to the German front lines, each equipped with several thousand gas shells.
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