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21 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Metals are very useful in our everyday lives. Ores are? |
Naturally occurring rocks that provide an economic starting point for the manufacture of metals. |
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Iron ore is used to make? |
Iron and steel |
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Copper can be easily extracted so why are new methods of extracting copper being developed? |
Because copper rich ores are becoming scarce. |
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Is it economical to extract metals? |
It is economical to extract metals because ores contain enough to metal but this may change over time. |
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Ores are mined and may be? |
Concentrated before the metal is extracted and purified. |
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Give an example of a metal that is found by itself? |
Gold |
Most metals are found as compounds that require chemical reactions to extract the metal. |
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Metals that are less reactive than carbon can be extracted from their oxides by reduction with carbon. Give one example. |
Iron oxide is reduced in the blast furnace to make iron. |
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Knowledge and understanding is limited to the reduction of oxides using ------? |
Carbon |
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Knowledge of reduction is limited to the removal of -------? |
Oxygen |
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Metals that are more reactive than carbon, such as aluminium, are extracted by? |
Electrolysis of molten compounds. |
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What is the problem with using large amounts of energy in the extraction of these metals? |
It is very expensive. |
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Copper can be extracted from copper-rich ores by heating the ores in a? |
Furnace |
(Smelting) |
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Copper can be purified by? |
Electrolysis |
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The supply of copper-rich ores is? |
Limited. |
Unlimited or limited? |
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Copper is extracted from its ores by chemical processes that involve? |
Heat or electricity |
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Copper rich ores are being? |
Reduced and traditional mining and extraction have major environmental impacts. |
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New way of extracting copper from low-grade ores are being researched to limit the environmental impact of traditional mining. Copper can be extracted by ? |
Phytomining or by bioleaching. |
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Phytomining uses plants to? |
Absorb metal compounds |
The plants are burned to produce ash that contains the metal compounds. |
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Bioleaching uses bacteria to produce leachate solutions that contain? |
Metal compounds |
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Copper can be obtained from solutions of copper salts by? |
Electrolysis or by displacement using scrap iron. |
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During electrolysis where do the positive ions move to? |
Positive ions move towards the negative electrode. |
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