Electrolysis

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What happens when an ionic substance is melted or dissolved in water?
The ions are free to move about within the liquid or solution.
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What is the electrolyte?
The substance that is broken down into molten or in solution.
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Explain the process of electrolysis.
Passing an electric current through ionic substances that are molten or in solution breaks them down into elements.
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Positively charged ions move to which electrode?
Negative electrode (cathode)
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Negatively charged ions move to which electrode?
Positive electrode (anode)
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What can electrolysis be used for?
Electroplating objects.
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What happens at the negative electrode?
Positively charged ions gain electrons (REDUCTION).
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What happens at the positive electrode?
Negatively charged ions lose electrons (OXIDATION).
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How is aluminium manufactured by electrolysis?
A molten mixture of aluminium oxide and cryolite are mixed together. Aluminium forms at the negative electrode oxygen forms at the positive electrode. The positive electrode is made from carbon, which reacts with the oxygen to make carbon dioxide.
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Other cards in this set

Card 2

Front

What is the electrolyte?

Back

The substance that is broken down into molten or in solution.

Card 3

Front

Explain the process of electrolysis.

Back

Preview of the front of card 3

Card 4

Front

Positively charged ions move to which electrode?

Back

Preview of the front of card 4

Card 5

Front

Negatively charged ions move to which electrode?

Back

Preview of the front of card 5
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