Why is the reaction of alkenes with HCl (a rapid, simple reaction) NOT useful as a characterization reaction, but reaction with Br2 is a good characterization reaction?
2006-11-06 05:56:50 · 6 answers · asked by kelxcore09 1 in Science & Mathematics ➔ Chemistry
HCl - Clear colourless to light-yellow liquid
Bromine - gas/liquid: red-brown solid: metallic luster
Bromine is the only liquid nonmetallic element at room temperature and one of five elements on the period table that are liquid at or close to room temperature. The pure chemical element has the physical form of a diatomic molecule, Br2. It is a heavy, mobile, reddish-brown liquid, that evaporates easily at standard temperature and pressures in a red vapor (its color resembles nitrogen dioxide) that has a strong disagreeable odor resembling that of chlorine
2006-11-06 05:59:56 · answer #1 · answered by DanE 7 · 0⤊ 0⤋
Appearance Of Bromine
2016-12-29 21:28:43 · answer #2 · answered by ? 3 · 0⤊ 0⤋
Bromine Appearance
2016-11-09 22:43:19 · answer #3 · answered by ? 4 · 0⤊ 0⤋
HCl is an acid, that is colorless and odorless. It is not very reactive on its own with compounds that contain double bonds.
Br2 is an orange liquid that is very reactive through an addition reaction with compounds that contain double or triple bonds. When the reaction occurs the orange color of the bromine disappears, letting us know that a double bond was present in the compound and that bromine has been added to the double bond. It also lets us know that the compound is now saturated (contains all single bonds)
2006-11-06 07:48:59 · answer #4 · answered by Annnie 2 · 0⤊ 0⤋
Br2 is a syn addition reaction. It attacks the double bond of an alkene from the same side, this also breaks the Br-Br bond. When the Br-Br bond is broken, the solution becomes colorless.
2006-11-06 07:06:08 · answer #5 · answered by David K 2 · 0⤊ 0⤋
HCl solution is practically colorless. Bromine solution is red-brown colored. When alkenes react with Bromine solution this becomes colorless, and this modification can be observed ease. From this reason reaction is using for identification of alkenes
2006-11-06 06:21:51 · answer #6 · answered by Tora 2 · 1⤊ 0⤋