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19 Cards in this Set
- Front
- Back
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How do we Determine How to Extract Metals? |
Method of extraction depends on how reactive the metal is. |
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For Metals Above Carbon in the Reactivity Series |
Use electrolysis to extract |
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For Metals Between Carbon and Hydrogen in the Reactivity Series |
Reduction via carbon |
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Metals Below Hydrogen in the Reactivity Series |
These are found pure/native. |
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Extraction of iron |
Reduced with carbon in a blast furnace. |
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Properties of cast iron |
Brittle and hard |
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What effect will adding more carbon to cast iron have? |
Make it brittle but strong |
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What effect will having less carbon in cast iron have? |
Make it soft but malleable. |
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What does OILRIG stand for? |
Oxidation is loss, reduction is gain [of electrons] |
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Electrolysis of Brine - Cathode |
Hydrogen is collected at the cathode, which forms a covalent bond with another hydrogen to form a hydrogen gas molecule. More reactive. |
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Electrolysis of Brine - Anode |
Chloride ions are collected here. |
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Electrolysis of Aluminium Oxide- Why is Cryolite added? |
Lowers the activation energy so less energy is required to melt the electrolyte, so it becomes less expensive |
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Electrolysis of Aluminium Oxide- Why do the anodes need replacing? |
The oxygen reacts with the carbon in the anode to produce CO2. |
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What Types of Ions do Metals Form? |
Positive |
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What Types of Ions do non-Metals Form? |
Negative |
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Reactions at the Cathode |
Positive (Metal) ions attracted, oxidation reaction, loses electron(s) |
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Reactions at the Anode |
Negative (non-metal) ions attracted, reduction reaction, gains electron(s) |
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Properties of Alloys |
Compound containing two or more metals that are bonded |
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