Chemistry 1
0.0 / 5
- Created by: Evie
- Created on: 13-05-13 16:05
What are saturated Hydrocarbons called?
Alkanes
1 of 48
What is the formula for an Alkane
CnH2n+2
2 of 48
Alkanes are fairly....
Unreactive
3 of 48
During combustion, what are oxidised?
Carbon and Hydrogen
4 of 48
What cause acid rain?
Nitrogen Oxides like Sulfur Dioxide
5 of 48
What is it called when large chains of Hydrocarbons are broken own?
Cracking
6 of 48
What does cracking involve?
Heating the Hydrocarbons until they vapourise and passing the vapour over a hot catalyst or mixed with steam. A thermal decomposition reaction takes place
7 of 48
What are unsaturated Hydrocarbons called?
Alkenes
8 of 48
What type of bonds do Alkenes have?
Double carbon-carbon bonds.
9 of 48
What do alkenes do to Bromine Water?
Turn it colourless
10 of 48
What do alkanes do to Bromine Water?
It stays orange
11 of 48
What is the formula for an Alkene?
CnC2n
12 of 48
What is the formula for making Alcohol from Ethene
Ethene + Steam --------------------> Ethanol
13 of 48
What is the formula for making Alcohol by Fermentation
Sugar -----------------> Ethanol + Carbon Dioxide
14 of 48
Why are alkenes useful for making other molecules?
Because they have a double bond
15 of 48
What are polymers?
A long chain of monomers
16 of 48
What is Polymerisation?
When many small alkene molecules (monomers) join together to form Polymers
17 of 48
What is the most common synthetic Polymers?
Plastic
18 of 48
What is a disadvantage of Polymers?
They are not biodegradable so they are not broken down my microbes.
19 of 48
What are Polymers used for?
Medicine and Dentisry e.g. (1) implantable materials are used for tissue surgery (2) hard-wearing anti-bacterial dental cements (3) coating and fillers are used in dentistry (4) hydrogels can be used as wound dressing
20 of 48
Plastic is cheap and easy to produce, but this means..
There is a lot of plastic waste
21 of 48
What does burning plastics produce?
Pollution
22 of 48
Where are plastics dumped?
Landfill sites
23 of 48
Most plastics are non-biodegradable. This means..
That they cannot be broken down by microbes, they don't decompose and the fill up landfill.
24 of 48
What do Vegetable oils congtain?
Double carbon-carbon bonds. This makes them unsaturated.
25 of 48
Why are vegetable oils used in cooking?
They have a higher boiling point than water so they cook food faster and it increases the energy that it releases when eaten
26 of 48
The more double carbon-carbon bonds there are...
The lower the Boiling Points
27 of 48
Where are unsaturated fats melting points?
Below room temperature
28 of 48
What does hydrogenation entail?
The oil is heated to 60 degrees with a nickel catalyst.
29 of 48
What happens in hydrogenation?
The double carbon-carbon bond is removed so the fat is saturated and becomes harder
30 of 48
What are the properties of Emulsions?
(1) better texture (2) better appearance (3) better coating ability
31 of 48
What are the uses of Emulsions?
(1) ice cream (2) cosmetics (3) paints (4) salad dressings
32 of 48
What do Emulsifier molecules have?
Head-Hydrophilic that mixes with water Tail-Hydrophobic that mixes with oil
33 of 48
What does the Earth consist of?
Crust, Mantle, Inner Core, Outer Core
34 of 48
What did scientist think mountains once were?
They were caused by shrinkage of the crust when the Earth cooled down following its formation.
35 of 48
What is the evidence of Continental Drift?
(1) Closely matching coastlines (2) Similar patterns of rock which contains fossils of the same plants and animals
36 of 48
Who was the Scientist that created the Continental Drift Theory?
Alfred Wegner
37 of 48
The Earth is cracked into
Tectonic Plates
38 of 48
What creates Convection Currents?
Radioactive Decay
39 of 48
How far do Tectonic Plates move each year?
A few centimeters each year
40 of 48
What happens in Convection Currents?
Hot molten rock rises creating a new crust the older crust cools and sinks and the land masses on these plates move
41 of 48
Where are volcanoes and earthquakes commonly?
Plate Boundaries
42 of 48
Why are earthquakes hard to predict?
Because the start underwater
43 of 48
Who are responsible for the Primordial Soup Theory?
Miller and Urey
44 of 48
What gases are present in the Primordial Soup Theory?
Ammonia Water and Methane
45 of 48
What do the Sparks represent in the Primordial Soup Theory?
Lightening or Ultraviolet Radiation from the Sun
46 of 48
What were formed in the Primordial Soup Theory?
Amino Acids
47 of 48
What has increased the amount of carbon dioxide in the atmosphere?
Volcanic Activity (trapped in rocks deep into the earth) release CO2 into the atmosphere. The burning of fossil fuels.
48 of 48
Other cards in this set
Card 2
Front
What is the formula for an Alkane
Back
CnH2n+2
Card 3
Front
Alkanes are fairly....
Back
Card 4
Front
During combustion, what are oxidised?
Back
Card 5
Front
What cause acid rain?
Back
Related discussions on The Student Room
- A-level chemistry revision, taking notes and exam practise help and paper 3 »
- My attempt at not sabotaging my future career! »
- Is my degree unusually difficult or am I bust? »
- 10 weeks going from C to A* - Alevel »
- 7 weeks of revision...for medicine...my timetable »
- 100 days until A Levels »
- Chemistry alevel AQA help »
- Topics for chemistry »
- Is Chemistry better at A-level than at GCSE? »
- Chemistry textbook »
Similar Chemistry resources:
2.5 / 5 based on 3 ratings
3.0 / 5 based on 2 ratings
1.0 / 5 based on 3 ratings
4.0 / 5 based on 1 rating
3.0 / 5 based on 1 rating
4.5 / 5 based on 2 ratings
1.0 / 5 based on 1 rating
1.0 / 5 based on 3 ratings
2.0 / 5 based on 1 rating
3.0 / 5 based on 1 rating
Comments
No comments have yet been made