Chemistry: Electrolysis

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  • Created by: 11nmiller
  • Created on: 17-03-16 09:27
What name is given to a negatively charged particle?
Anion.
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What name is given to a positively charged particle?
Cation.
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What happens when electricity is passed through molten lead bromide?
It splits into lead and bromine. Electrolysis happens whenever electricity is passed through a molten or dissolved ionic compound. This splits the compound up into elements, in this case lead and bromine.
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If electricity is passed through molten zinc chloride, what happens?
Zinc is formed at the cathode and chloride at the anode. Metal ions are positively charged, so they are attracted to the cathode. Chloride ions are negative, so they are attracted to the anode.
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In the electrolysis of zinc chloride, which is the correct half equation for the negative electrode (cathode)?
Zn ²(+) + 2e(-) → Zn
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Which electrolyte could be used when purifying copper?
Copper sulfate. To purify copper by electrolysis, you need to use an electrolyte than contains copper ions, like copper sulfate.
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Write a half equation that shows what happens at the negative electrode when purifying copper by electrolysis?
Cu²(+) + 2e(-) →Cu
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What is one 'faraday'?
A faraday is a unit of charge that is equivalent to one mole of electrons.
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What is produced when concentrated aqueous sodium chloride is electrolysed?
Hydrogen is produced at the cathode because sodium is more reactive than hydrogen. The solution contains hydroxide ions (which produce oxygen and water if discharged) and chloride ions (which produce chlorine if discharged). Since the concentration o
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What is produced when concentrated aqueous copper chloride is electrolysed?
Copper is produced at the cathode because it is less reactive than hydrogen. The solution contains hydroxide ions (which produce oxygen and water if discharged) and chloride ions (which produce chlorine if discharged). Since the concentration of chlo
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Card 2

Front

What name is given to a positively charged particle?

Back

Cation.

Card 3

Front

What happens when electricity is passed through molten lead bromide?

Back

Preview of the front of card 3

Card 4

Front

If electricity is passed through molten zinc chloride, what happens?

Back

Preview of the front of card 4

Card 5

Front

In the electrolysis of zinc chloride, which is the correct half equation for the negative electrode (cathode)?

Back

Preview of the front of card 5
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