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Bromine water, Br 2. Bromine water is an oxidizing, intense brown mixture containing diatomic bromine (Br 2) dissolved in water (H 2 O). [1] It is often used as a reactive in chemical assays of recognition for substances which react with bromine in an aqueous environment with the halogenation mechanism, mainly unsaturated carbon compounds (carbon compounds with 1 or more double or triple bond(s)).
Bromothymol blue is synthesized by addition of elemental bromine to thymol blue in a solution in glacial acetic acid. [6] To prepare a solution for use as pH indicator, dissolve 0.10 g in 8.0 cm 3 N/50 (a.k.a. 0.02 Normal) NaOH and dilute with water to 250 cm 3.
According to the CDC, as of 2020, levels that it is normal to be exposed to in drinking water are lower than levels known to cause health problems. [1] A small number of studies have examined the effects of low levels of bromodichloromethane on people, but most were also exposed to other chemicals, so it may not be the only cause of reported health problems. [1]
The more unsaturated an unknown is, the more bromine it reacts with, and the less coloured the solution will appear. [ 1 ] Should the brown colour not disappear, possibly due to the presence of an alkene which doesn't react, or reacts very slowly with, bromine, the potassium permanganate test should be performed, in order to determine the ...
If an alcohol thermometer utilizes a combination of ethanol, toluene, and pentane, its lower temperature range may be extended to measure temperatures down to as low as −200 °C (−328 °F). [3] However, the measurement temperature range c. −200 °C to 78 °C, is highly dependent upon the type of alcohol used.
He calculated that her blood alcohol content at 9 a.m., the time of the blood test, was between .078% and .083%, right around the legal limit for intoxication in Massachusetts.