Alkene decolourisation of bromine water

Alkene decolourisation of bromine water

A500/0726 Rights Managed

Request low-res file

530 pixels on longest edge, unwatermarked

Request/Download high-res file

Uncompressed file size: 49.6MB

Downloadable file size: 4.4MB

Price image Pricing

Please login to use the price calculator


Credit: ANDREW LAMBERT PHOTOGRAPHY/SCIENCE PHOTO LIBRARY

Caption: Alkene decolourisation of bromine water. Image 2 of 3. Middle of the reaction of bromine water (Br2, brown) with ethene (C2H4, a gaseous alkene) in a test tube. The ethene is being bubbled into the bromine water through the glass tube in the test tube. This is an electrophilic addition reaction that is decolourising the bromine. The bromine adds across the ethene double bond, producing the colourless 1,2-dibromoethane (C2H4Br2). This reaction is used to demonstrate the reactivity of the alkene double bond. In contrast, single-bonded alkanes do not react with bromine unless ultraviolet light is used to initiate the reaction. For a sequence of the decolourisation, see images A500/725-727.

Release details: Model release not required. Property release not required.

Keywords: addition, alkane, alkene, bromine, bromine water, bromoalkane, chemical, chemistry, classroom, decolorisation, decolorization, decolourisation, decolourization, demonstration, dibromoethane, educational, electrophilic, ethene, experiment, experimenting, halogen, lab, laboratory, lesson, middle, reacting, reaction, school, sequence, symmetrical alkene, test tube

Licence fees: A licence fee will be charged for any media (low or high resolution) used in your project.