Chemistry 1

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What is an ore?
A rock which contains enough metal to make it worthwhile extracting the metal from it.
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Name a metal which can be extracted from its ore by reduction with carbon.
Zinc/iron/tin/copper.
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Why is electrolysis expensive?
Uses a lot of energy.
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Name a process used to purify copper.
Electrolysis.
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Explain how phytomining can be used to extract copper.
Growing plants in soil that contains copper. The plants can't use or get rid of the copper so it builds up in the leaves. The plants can be harvested, dried and burned.The copper is then collected from the ash.
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Copper is not usually extracted from its ore by electrolysis. Suggest why this is.
It can be extraced by reduction with carbon, which is cheaper than electrolysis.
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Copper sulphate solution can be electrolysed to obtain pure copper. Explain what happens to Cu2+ ions in the solution during this process.
Move towards negative electrode.
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Copper needs to be extracted from its ore before it can be used. Why are scientists trying to find new ways to extract copper from low-grade ores?
Supply of copper rich ores is limited/ demand for copper is growing.
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It is possible to extract copper from the copper sulphide using bacteria. What is the name of this method?
Bioleaching.
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It is possible to extract copper from the copper sulphide using bacteria. Describe the process involved with this method.
Bacteria produce a (leachate) solution that contains copper.
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It is possible to extract copper from the copper sulphide using bacteria. Give one advantage of using this method rather than other methods.
Much smaller impact on environment.
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It is possible to extract copper from the copper sulphide using bacteria. Give one disadvantage of using this method rather than other methods
It's slow.
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Name one metal which is extracted from it's ore using electrolysis.
Potassium/sodium/calcium/magnesium/aluminium.
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Some metals can be extracted from their ores by reduction with carbon, producing the metal and carbon dioxide. Explain the meaning of reduction.
Removal of oxygen.
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Write a word equation for the reduction of zinc oxide by carbon.
Zinc oxide+carbon=zinc+carbon dioxide
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In which of these test tubes will a reaction occur? Explain your answer.
B-Iron is more reactive than copper, so iron will displace copper.
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Explain why recycling metals is important.
1.Extracting metals=energy from fossil fuels.2.Recycling saves fossil fuels(running out)so saves energy.3.Less fossil fuels=less pollution.4.Less energy used=recycling saves money.5.Recycling=less metals to landfill sites.6.Conserve resources.
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Other cards in this set

Card 2

Front

Name a metal which can be extracted from its ore by reduction with carbon.

Back

Zinc/iron/tin/copper.

Card 3

Front

Why is electrolysis expensive?

Back

Preview of the front of card 3

Card 4

Front

Name a process used to purify copper.

Back

Preview of the front of card 4

Card 5

Front

Explain how phytomining can be used to extract copper.

Back

Preview of the front of card 5
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