properties of hydrocarbon

Title : Properties of hydrocarbon
Objective : 1) To study the properties of hydrocarbons. 2) To determine the unknown samples.

Results :

Part A : Combustion

Compounds

Observations
Hexane

There was orange flame and burned mildly during the burning process. No soots and smoke were produced.
C6H14 + 19/2 O2 6CO2 + 7H2O

Cyclohexene

Orange flame burned vigorously. A small amount of black soot and smoke were produced during the burning process.
C6H10 + 17/2 O2 6CO2 + 5H2O

Toluene

Orange flame burned very vigorously. A large amount of black soot and smoke were produced during the burning process.
C7H8 + 9O2 7CO2 + 4H2O

Unknown A

There was orange flame and burned mildly during the burning process. No soots and smoke were produced.

Unknown B
Orange flame burned vigorously. A small amount of black soot and smoke were produced during the burning process.

Part B : Reaction with bromine

Compounds
Observations

In the dark

Exposed to sunlight
Hexane
Two layers were formed in the mixture. Upper layer was colourless and lower layer was pale yellow.
Two layers were formed in the mixture. Upper layer was colourless and lower layer was pale yellow.

Cyclohexene
Two layers were formed in the mixture. Both layers were colourless.

Two layers were formed in the mixture. Both layers were colourless.

Toluene
Two layers were formed in the mixture. Upper layer was cloudy white while lower layer was colourless and cold.
Two layers were formed in the mixture. Upper layer was yellow in colour while lower layer was colourless and cold.
Unknown A
Two layers were formed in the mixture. Upper layer was colourless and lower layer was pale yellow.

Two layers were formed in the mixture. Upper layer was colourless and lower layer was pale yellow.
Unknown B
Two layers were formed in the mixture. Both layers were colourless.

Two layers were formed in the mixture.