Describe two chemical tests that can be used to distinguish between the following pair of compounds?
PLEASE, WRITE OUT THE EQUATIONS, INCLUDING THE REAGENTS AND THE PRODUCTS.
i) butane and 2-butene
PLEASE, WRITE OUT THE EQUATIONS, INCLUDING THE REAGENTS AND THE PRODUCTS.
i) butane and 2-butene
1 Answer
Try the bromine decolourization test and the Baeyer unsaturation tests.
Explanation:
Test 1. Bromine decolourization test
Add a few drops of a solution of
The butane will not react (left-hand test tube). The but-2-ene will decolourize the bromine solution (right-hand test tube).
Test 2. The Baeyer test
Bubble each gas through a cold, dilute, aqueous solution of
With butane, there will be no colour change (top test tube).
With but-2-ene, the purple colour will disappear and a dark brown precipitate will form (bottom test tube).