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11 Cards in this Set
- Front
- Back
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How does subduction work |
Oceanic plates are less dense so they sink under continental plate |
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How do crystals from igneous rock form differently |
Large crystals larva cools slowly Small crystals larva cools quickly |
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What is thermal decomposition |
Metal carbonate = metal oxide + carbon dioxide Chemically changed when heated |
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Electrolysis of copper |
Cathode - Cu + 2e = Cu reduction pure copper is formed Anode - Cu - 2e = Cu oxidisation impurities collect under |
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What conditions are needed for rusting |
Oxygen and water are both needed |
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Describe the Haber process |
Nitrogen + hydrogen = ammonia High pressure A temperature of 450 C Iron catalyst to speed up reaction Reaction can go both ways |
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Neutralisation process |
Acid + base = a salt + water The hydrogen ions react with the base's OH ions to make water |
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Describe eutrophication |
Fertilisation wash into lake Increased nitrate or phosphate in water Algae bloom faster Plants shaded by algae die Aerobic decay bacteria use oxygen Living organisms in water die |
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Describe solution mining |
Water pumps into deposits Sodium chloride dissolves in water Brine is pumped to surface This may cause subsidence where lands slumps downwards |
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Electrolysis of brine |
Separation of chloride and hydrogen Anode - 2Cl - 2e = Cl oxidisation Cathode - 2H + 2e = H reduction
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How to test for chloride |
Blue Litmus paper turns red and white in chloride |
