Naming compounds Flashcards

1
Q

Define the term “Hydrocarbon”

A

A compound which contains carbon and hydrogen only

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2
Q

Define the term “Saturated hydrocarbon”

A

A hydrocarbon which contains only single carbon-carbon bonds

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3
Q

Define the term “unsaturated hydrocarbon”

A

A hydrocarbon which contains one or more double carb-carbon bonds

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4
Q

Define the term “functional group”

A

A group of atoms responsible for the characteristic reactions of a compound

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5
Q

Define the term “homologous series”

A

A family of similar compounds with similar chemical properties due to the same functional group
Each successive member differs by a CH2 group
Show a trend in physical properties

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6
Q

Define the term “structural isomers”

A

Compounds with the same formula but different structures

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7
Q

Define the term “Macromolecule”

A

A large molecule built up from small units called monomers

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8
Q

What is a test for unsaturated hydrocarbons?

A

Unsaturated hydrocarbons will decolourise bromine water (orange to colourless)

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9
Q

How do you name compounds that are alkanes

A

-ane e.g. methane

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10
Q

How do you name compounds that are alkenes

A

-ene e.g. methene

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11
Q

How do you name compounds that are alcohols

A

-ol e.g. methanol

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12
Q

How do you name compounds that are carboxylic acids

A

-oic acid e.g. methanoic acid

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13
Q

How do you name compounds that are esters

A

-alkyl-oate e.g. methyl ethanoate

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14
Q

Name the first four alkanes

A

Methane
Ethane
Propane
Butane

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15
Q

What is the equation for cracking alkanes

A

Alkane —–> Shorter alkane + alkene (heat and cayaylst used)

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16
Q

What is the equation for cracking ethane

A

Ethane —-> Ethene +Hydrogen (Catalyst and heat used)

17
Q

What is the equation for combustion of alkanes

A

Alkane + oxygen —–> carbon dioxide + water

18
Q

What is the equation for making chloroalkanes

A

CH4 + Cl2 —–> CH3Cl + HCl (UV light used)

19
Q

What is the equation for hydrogenation of alkenes

A

Ethene + Hydrogen —-> Ethane (Cataylst, heat and pressure used)

20
Q

What is the equation for bromination of alkenes

A

Ethene + bromine —–> c2h4br2

21
Q

What is the equation for hydration of alkenes

A

ethene + water —-> C2H5OH

22
Q

What are the two methods of making ethanol

A

1.) Fermentation of sugars - The sugar is dissolved in water and yeast is added, at about 37*C, Ethanol and carbon dioxide are produced in the absence of air
C6H12O6 —–> 2C2H5OH + 2CO2

2.) Hydration of ethene - ethene + Water —-> ethanol

23
Q

What is the equation for combustion of ethanol

A

C2H5OH + 3O2 —-> 2CO2 + 3H2O

24
Q

What is the equation for making carboxylic acid

A

Ethanol ——-> Ethanoic acid

25
Q

What is the equation for making esters

A

Carboxylic acid + alchahol —–> ester

26
Q

Give three examples of fossil fuels

A

Coal
Natural gas
Petroleum

27
Q

How are fossil fuels formed

A

They are formed from the remains of plant & animals that lived millions of years ago

28
Q

What is the chemical composition of petroleum

A

A mixture of hydrocarbons of different sizes

29
Q

How are different components separated

A

The different length hydrocarbons have different boiling points, so they can be separated by fractional distillation

30
Q

How does the size of molecules in petroleum affect their properties

A

Higher boiling points
Higher viscosities
Less volatile
Burn less easily

31
Q

State uses for the 8 different fractions obtained when petroleum is refined industrially

A

Refinery gas - bottled gas for heating & cooking
Gasoline - Petrol for cars
Naptha - making chemicals
Paraffin - aircraft fuel
Diesel oil - fuel for diesel engines
Fuel oil - fuel for ships & home heating systems
Lubricating fraction - lubricants, waxes & polishes

32
Q

What are the uses of alkenes

A

Making plastics

33
Q

What are the uses of ethanol’s

A

as a solvent

as a fuel

34
Q

What is a polymer

A

A large molecule built up from small units called monomers

35
Q

Explain what is meant by addition polymer

A

Made from a single monomer which has a c-c double bond

Forms when the double bonds in alkene monomers break and the monomers join together

36
Q

What is meant by a condensation polymer

A

A polymer formed when one or two different monomers, each containing two functional groups, join together to form a chain

A small molecule (usually water) is eliminated between each pair of monomers

e.g. proteins, complex carbohydrates (Natural)
Nylon, terylene (synthetic)