In Molten Ionic Compounds There’s Only One Source of Ions Flashcards
Why can molten ionic compounds be electrolysed?
Because the ions can move freely
What are they usually broken up into?
Their elements
What is a good example of this?
The electrolysis of molten lead bromide
Why are +ve ions called Cations?
They’re attracted to the -ve CAThode
Why are -ve ions called Anions?
They’re attracted to the +ve ANode
Where is bromine produced?
At the anode (+ve)
Where is lead produced?
At the cathode (-ve)
What are the +ve Pb² ions attracted to?
The -ve cathode
What does a lead ions do at the cathode?
Accepts two electrons to become a lead atom
What does the molten lead that forms do?
Sink to the bottom
What are the -ve Br- ions attracted to?
The +ve anode
What do two bromide ions do at the anode?
Lose one electron each and become a bromine molecule
What forms at the top of the anode?
Brown bromine gas
Why don’t the electrodes take part in the reaction?
They are made from an inert material (unreactive)
Look at diagram page 26
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