Chemistry C2 - OCR Higher teir

?
What is the earths structure?
Lithosphere, The crust, The core, The mantle.
1 of 36
Where are the oceanic plates?
Under the oceans
2 of 36
Where are the continental plates?
Carry the continents
3 of 36
3 things about an s wave?
Tranverse. Slow moving. Travel through solids only.
4 of 36
3 things about a p wave?
Longitudinal. Fast moving. Travel through liquids and solids.
5 of 36
What is the Lithosphere?
Made up of crust and upper part of mantle
6 of 36
What was Wegners theory of continental drift?
Proposed by Wegener, states that: -All continents were once joined. - They moved apart over time.
7 of 36
What was Wegner's theory evidence for?
Continents fit together like a jigsaw. Similar fossils found on different continents. Similar plants found on different continents
8 of 36
What was Wegner's theory evidence against?
He was not a trained meteorologist. Technology was not advanced enough to test his theory.
9 of 36
What is subduction?
Tectonic plates move together because of convection currents in the mantle. More dense tectonic plate (oceanic plate) goes underneath the less dense tectonic plate (continental plate)
10 of 36
What is limestone?
Also called calcium carbonate. Formula is CaCO3
11 of 36
3 properties of reinforced concrete?
Has a high tensile strengh. Concrete provides the strength. Steel provides the flexibility
12 of 36
What is a composite material?
Made of two different materials i.e reinforced concrete
13 of 36
Quarrying arguments for?
Creates jobs. Key minerals are collected.
14 of 36
Quarrying arguments against?
Destruction of landscape. Pollution caused.
15 of 36
Word equation for rusting?
Iron + oxygen + water --> hydrated iron (III) oxide1
16 of 36
What is needed for rusting?
Needs iron, oxygen and water. Speeded up using acid/salt
17 of 36
What is an alloy?
Made up of more than one metal
18 of 36
Why is Aluminium better than steel?
Lightweight, better fuel economy.
19 of 36
Electrodes
Anode - Positive. Cathode - negative
20 of 36
How does copper electrolysis work?
Copper forms at the cathode (gets larger). Impurities appear at the anode (gets smaller). Electrolyte is copper sulfate (CuSO4)
21 of 36
What is the ionic equation at the cathode?
Cu^2+ + 2e^- --> Cu
22 of 36
What is the ionic equation at the anode?
Cu - 2e^- --> Cu^2+
23 of 36
What is salt electrolysis?
Hydrogen gas formed at the cathode. Chlorine gas formed at anode. Electrolyte is brine (salt water)
24 of 36
Symbol equation for salt electrolysis at cathode?
2H^+ + 2e^- --> H2
25 of 36
Symbol equation for salt electrolysis at anode?
2Cl^- - 2e^- --> Cl2
26 of 36
3 things about acids?
Are proton donors. Have a pH of 1-6. Give the colour red with universal indicator
27 of 36
4 things about alkalis/bases?
Alkalis are soluble bases. Alkalis are proton acceptors. Have pH of 8-14. Gve the colour purple with universal indicator
28 of 36
How to know whether something is strongly or weakly acidic?
pH 7.1 - weak alkaline. pH 6.9 - Weak acid
29 of 36
What are the equations for nuetralisation?
Acid + base --> salt + water. H^+ + OH^- --> H2O. Acid + carbonate --> salt + water + carbon dioxide
30 of 36
3 conditions needed for the haber process?
High temperature (450 degrees) , High pressure (200 atm) and Iron catalyst.
31 of 36
Word and symbol equation for haber process?
Nitrogen + Hydrogen --> Ammonia. N2 + 3H2 --> NH3
32 of 36
Justify the conditions for haber process?
High temperature --> Low yield but faster rate. Also expensive. High pressure --> High yield and faster rate. Expensive and dangerous. Catalyst --> No effect on yield, but faster rate.
33 of 36
3 fertiliser elements?
Nitrogen (N), Potassium (K), Phosphorous (P). Nitrogen helps to make proteins.
34 of 36
What is the method to make a fertiliser?
Measure out acid and alkali and add them together in a burette until it reaches the point of neautralisation. Use litmus paper as an indicator to check. Your then left with salt and water then heat it. Use a filter funnel. Left with solid fertiliser
35 of 36
What is the process of eutrophication?
Fertiliser runs off into rivers and streams causing algal bloom. Sunlight cannot get to plants so they die. Bacteria decompose the plant and uses any remaining oxygen. No oxygen in water so animals die.
36 of 36

Other cards in this set

Card 2

Front

Where are the oceanic plates?

Back

Under the oceans

Card 3

Front

Where are the continental plates?

Back

Preview of the front of card 3

Card 4

Front

3 things about an s wave?

Back

Preview of the front of card 4

Card 5

Front

3 things about a p wave?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all All c2 resources »