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8 Cards in this Set
- Front
- Back
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What is electrolysis? |
Electrolysis is a process in which electrical energy, from a direct current (dc) supply breaks down electrolytes to form elements |
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Where do positive ions (metal ions or H+ ions) move towards during electrolysis? |
The cathode; they are known as cations Positive ions are attracted towards negative |
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Where do the negative ions (non-metal ions) move towards during electrolysis? |
The anode; they are known as anions Negative ions are attracted to the positive |
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After passing the current for a short time, what colour does the solution around the CATHODE become? |
BLUE |
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After passing the current for a short time, what colour does the solution around the ANODE become? |
YELLOW |
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How are these colours produced? |
By the movement (migration) of the ions in the salt |
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What do the use of coloured ions in solution show? |
The direction that positive & negative ions move in an electronic field |
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What type of rods are dipped into the test liquid during electrolysis and why? |
Graphite |
