ELECTROLYSIS

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What do ionic substances contain?
Ionic substances contain charged particles called ions
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What is ELECTROLYSIS?
ELECTROLYSIS is the process ionic substances are decomposed into simpler substances when an electric current passes through them
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What does the substance have to be in for ELECTROLYSIS to work?
Molten or a solution
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Why does ELECTROLYSIS have to work in molten or a solution?
For ELECTROLYSIS to work, ions have to be free to move so they can carry an electrical charge to break down the ionic substances
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What happens during ELECTROLYSIS?
Positive ions move to the negative electrode - They receive electrons and are reduced. Negative ions move to the positive electrode - They lose electrons and are oxidised
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What is the substance which is broken down in ELECTROLYSIS called?
Electrolyte
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What is ELECTROLYSIS used for?
Electroplating
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What is the most abundant (found in large quantities) metal on Earth?
Aluminium
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Why is Aluminium expensive to extract?
It uses a lot of electricity to extract
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What is Aluminium ore called?
Bauxite
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What are the three products of ELECTROLYSIS?
Hydrogen is used as a fuel and for making ammonia. Chlorine is used to kill bacteria in water, and to make bleach and plastics. Sodium hydroxide is used to make soap and bleach
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What is a half-equation?
Half-equations shows you what happens at one of the electrons during ELECTROLYSIS
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How do you write half-equations?
A half-equation is balanced by adding, or taking away, a number of electrons equal to the total number of charges on the ions in the equation.
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Card 2

Front

What is ELECTROLYSIS?

Back

ELECTROLYSIS is the process ionic substances are decomposed into simpler substances when an electric current passes through them

Card 3

Front

What does the substance have to be in for ELECTROLYSIS to work?

Back

Preview of the front of card 3

Card 4

Front

Why does ELECTROLYSIS have to work in molten or a solution?

Back

Preview of the front of card 4

Card 5

Front

What happens during ELECTROLYSIS?

Back

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