Describe two chemical tests that can be used to distinguish between the following pair of compounds?

Question

PLEASE, WRITE OUT THE EQUATIONS, INCLUDING THE REAGENTS AND THE PRODUCTS.
i) butane and 2-butene

Ruby Allen · Accepted Answer

Try the bromine decolourization test and the Baeyer unsaturation tests.

Test 1. Bromine decolourization test

Add a few drops of a solution of #"Br"_2# in #"CCl"_4# to a solution of each hydrocarbon in #"CCl"_4#.

The butane will not react (left-hand test tube). The but-2-ene will decolourize the bromine solution (right-hand test tube).

#"CH"_3"CH=CHCH"_3 + underbrace("Br"_2)_color(red)("brown") → underbrace("CH"_3"CHBrCHBrCH"_3)_color(red)("colourless")#

Test 2. The Baeyer test

Bubble each gas through a cold, dilute, aqueous solution of #"KMnO"_4#.

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).

#"3CH"_3"CH=CHCH"_3 + underbrace("2MnO"_4^"-")_color(red)("purple") + 4"H"_2"O"#

#→ "3CH"_3"CH(OH)CH(OH)CH"_3 + underbrace("2MnO"_2)_color(red)("dark brown precipitate") + 2"OH"^"-"#

Delilah Anderson · Answer

undefined To distinguish between two compounds, two common chemical tests are:

1. Solubility Test: This test involves dissolving the compounds in different solvents to observe their solubility characteristics. For example, if one compound is soluble in water but the other is not, it indicates a difference in polarity or functional groups.

2. Acid-Base Reaction: This test involves treating the compounds with an acid or a base and observing their reactions. Compounds with acidic functional groups will react with bases to form salts, while compounds with basic functional groups will react with acids to form salts. The presence or absence of such reactions can help distinguish between the compounds.

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