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35 Cards in this Set
- Front
- Back
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What happens when metals react with other substances |
The metal atoms lose electrons to form positive ions |
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Reactivity series(high to low) |
Potassium sodium lithium calcium magnesium carbon zinc iron hydrogen copper gold |
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What happens when a metal reacts with water |
A metal hydroxide and hydrogen are formed |
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Sodium + water = |
Sodium hydroxide + hydrogen |
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When a metal reacts with a dilute acid |
A salt and hydrogen are formed |
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When a metal reacts with a dilute acid |
A salt and hydrogen are formed |
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Oxidation |
Loss of electrons |
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When a metal reacts with a dilute acid |
A salt and hydrogen are formed |
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Oxidation |
Loss of electrons |
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Reduction |
Gain of electrons |
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Displacement reactions |
A more reactive metal displaces a less reactive metal from its compounds |
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How to deduce a reactivity series |
Conduct several displacement reactions |
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How to deduce a reactivity series |
Conduct several displacement reactions |
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Redox reaction |
A reaction where reduction and oxidation happen at the same time |
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2 examples of redox reactions |
Electrolysis, displacement reactions |
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2 examples of redox reactions |
Electrolysis, displacement reactions |
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Ore |
A rock containing enough quantities of a mineral for extraction to be possible |
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2 examples of redox reactions |
Electrolysis, displacement reactions |
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Ore |
A rock containing enough quantities of a mineral for extraction to be possible |
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How are un reactive elements found in the earth’s crust |
As uncombined elements |
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2 examples of redox reactions |
Electrolysis, displacement reactions |
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Ore |
A rock containing enough quantities of a mineral for extraction to be possible |
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How are un reactive elements found in the earth’s crust |
As uncombined elements |
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What does an ore’s extraction method depend on |
Its position on the reactivity series |
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Why is electrolysis not always used for extraction of ores if it always works |
It is expensive |
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How are metals less reactive than carbon extracted |
Heating with carbon |
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Why is electrolysis not always used for extraction of ores if it always works |
It is expensive |
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How are metals less reactive than carbon extracted |
Heating with carbon |
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What must be used to extract a more reactive substance than carbon |
Electrolysis |
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Why is electrolysis so expensive |
Large amounts of electrical energy used in the extraction process |
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What form do the electrolytes of a substance must be in |
Molten state or dissolved in water |
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What are electrodes often made of |
Graphite |
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What happens at the cathode during electrolysis |
Aluminium ions gain electrons and form aluminium atoms |
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What happens at the cathode during electrolysis |
Aluminium ions gain electrons and form aluminium atoms |
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What happens at the anode during electrolysis |
Oxide ions lose electrons and form oxygen gas |
