Bromine water test for alkenes
Bromine water test for alkenes. When an alkene is added to a solution of bromine water (left) the solution is de-colourised (right). Alkenes are hydrocarbons that contain a carbon-carbon double bond. The number of hydrogen atoms in an alkene is double the number of carbon atoms. Alkenes can de-colourise bromine water, while alkanes cannot.
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