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Bromine: Water
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Bromine can easily be dissolved in water (35 g per L water), carbon disulfide and other organic solutions. When added to water, bromine forms hypobromous acid. Hyprobromous acid is a weak acid. It partly dissociates to form hydrogen ions and hypobromite ions. The rate of hypobromous acid and hypobromite ions is determined by the pH value of the water. When the pH value is between 6.5 and 9 both hypobromous acid and hypobromite ions can be found in water.
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Bromine is the 35th element in the Periodic table. Bromine was discovered by Antoine Balard in France in 1826. Bromine comes from the Greek word "bromos" meaning stench. On the periodic table Bromine is # 35 and its symbol is Br. Bomine has an atomic mass of 79.904. Bromine has 35 protons and 45 neutrons. Bromine can be found in sea water and salt beds.
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Bromine products are required by law to display on the label, their chemical name and concentration. When Bromine in its various forms is added to the water it produces Hypobromous acid (HOBr). Hypobromous acid controls bacteria and algae and oxidizes organics. Hypobromous acid is a weak acid and therefore not harmful to people. Bromine is not a strong enough oxidizer to oxidize or destroy ammonia and nitrogen compounds in the water.
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Bromine is denser than water, but dissolves slightly in water and colours it brown. This is followed by the generation of bromine vapours. There is a strong hazard to all types of water, in particular to drinking water, service water and waste water on account of the high toxicity linked to oxidising and corrosive properties. Bromides are found as accompanying ions in potassium and sodium deposits. The bromide content rises with increasing salinity. In coastal areas, higher bromide concentrations in the groundwater can be attributed to the infiltration of seawater.
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Bromine is found in seawater and exists as the bromide ion at a level of about 65 mg/l. Bromine has been used in swimming pools and cooling towers for disinfection... use in drinking water is not recommended. Ethylene bromide is used as an anti-knock additive in gasoline and methyl bromide is a soil fumigant. Bromine is extremely reactive and corrosive, and will produce irritation and burning to exposed tissues. Over 0.05 mg/1 in fresh water may indicate the presence of industrial wastes, possibly from the use of pesticides of biocides containing bromine Bromide is extensively used in the pharrnaceutical industry, and occurs normally in blood in the range of 1.5 to 50 mg/l.
Bromine is highly reactive and is a powerful oxidizing agent in the presence of water. It reacts vigorously with amines, alkenes and phenols as well as aliphatic and aromatic hydrocarbons, ketones and acids (these are brominated by either addition or substitution reactions). With many of the metals and elements, anhydrous bromine is less reactive than wet bromine; ... dry bromine reacts vigorously with aluminium, titanium, mercury as well as alkaline earth metals and alkaline metals.
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