Materials from the Earth

larissa.hayden08
Mind Map by larissa.hayden08, updated more than 1 year ago
larissa.hayden08
Created by larissa.hayden08 about 5 years ago
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Chemistry Unit 1, Topic 2
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Materials from the Earth
1 C1.5 Rocks & Their Formation
1.1 igneous rocks
1.1.1 solidification of magma/lava
1.1.2 interlocking crystals
1.1.3 slower cooling = larger crystals
1.1.4 e.g. granite
1.2 sedimentary rocks
1.2.1 layers of sediment compacted
1.2.2 erode easily
1.2.3 may contain fossils
1.2.4 e.g. chalk & limestone
1.3 metamorphic rocks
1.3.1 from existing rocks by heat/pressure
1.3.2 e.g. marble from chalk/limestone
2 C1.6 Limestone & Its Uses
2.1 uses
2.1.1 concrete/cement/glass
2.1.2 construction
2.1.3 steel/iron alloys
2.2 quarrying
2.2.1 advantages
2.2.1.1 provides jobs
2.2.1.2 limestone=important raw material
2.2.1.3 exported-aids UK economy
2.2.1.4 jobs help local economies
2.2.2 disadvantages
2.2.2.1 spoils scenery
2.2.2.2 lorries produce noise/pollution/traffic
2.2.2.3 dust/noise
2.2.2.4 destroys habitats
2.3 thermal decomposition
2.3.1 CaCO3 --> CaO + CO2
3 C1.8 Chemical Reactions
3.1 thermal decomposition
3.1.1 copper carbonate = easiest
3.1.2 zinc carbonate
3.1.3 calcium carbonate = hardest
3.2 atoms
3.2.1 smallest particle of element
3.2.2 take part in reactions
3.2.3 not created/destroyed
3.2.4 rearranged
3.3 mass
3.3.1 remains the same in sealed container
3.4 precipitation reaction
3.4.1 2 soluble reactants form insoluble precipitate
4 C1.9 Reactions of Calcium Compounds
4.1 making limewater
4.1.1 1. CaCO3 --> CaO+CO2
4.1.2 2. CaO+H2O --> Ca(OH)2
4.1.2.1 fizzing,steam,heat
4.1.3 3. Ca(OH)2+CO2 --> CaCO3+H2O
4.1.4 when CO2 is bubbled through calcium hydroxide limewater is produced
4.2 neutralising acids
4.2.1 calcium compounds neutralise acids
4.2.1.1 e.g. in soil
4.2.1.2 e.g. in power stations to get rid of sulphur dioxide and nitrogen oxides
4.2.1.3 this reduces acid rain
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