4.5 Organic 1 Flashcards
what is crude oil
A mixture of hydrocarbons
what are hydrocarbons
A compound made up of only hydrogen and Carbon only
what is the name of the process use to separate pure water from sea water
Simple Distillation
Identify the method used to separate the dyes in a food colouring
Chromatography
Identify the method use to obtain ethanol from a mixture of ethanol and water
Fractional Distillation
Name the process used to separate potassium Nitrate from potassium nitrate solution
Crystallisation
what is each fraction of crude oil
A mixture of similar Hydrocarbons with similar boiling points
Name the 6 Fractions in crude oil
Refinery
Gasoline
Kerosene
Diesel
Fuel oil
Bitumen
what is the use of each Fraction
Refinery- Cooking
Gasoline- Cars
Kerosene- Aircraft
Diesel- Trains
Fuel oil- Ships
Bitumen- Roads
what happens as you go down the fraction list
the boiling point increases
Molecular mass increases
The colour gets darker down the list
Viscosity (thickness) increases down the list
How does Fractional Distillation Work
- Heated Crude oil vapours enter the column
- Vapours rise until they reach their boiling point, when they condense.
- Different Vapours condense at different heights due to their different boiling points
- Similar vapours condense together as a fraction
What are fractions
Are mixtures containing the hydrocarbons that boil in a particular temperature range.
what are Alkanes
Alkanes are hydrocarbons that fit the general formula CnH2n+2
what is the general formula for Alkanes
CnH2n+2
what bonds join the c and H atoms
covalent bonds
what does the name of each alkane show
the start shows how many carbon atoms it has
The end of the names is ane- which shows it is an alkane