the ionic liquid where moving ions carry the current during electrolysis.
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What charge is the cathode and anode?
Cathode - Negative, Anode - Positive
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What happens at the cathode?
electrons are transferred from the electrode to the positive ions. They gain electrons, this is called reduction.
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Why is sodium an important substance?
Its used in streetlights -sodium vapour gives out a bright yellow when an electric currrent is passed through it. It also acts as a coolent in reactors - this is as it has a high thermal conductivity and transfers heat efficiently.
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What do half-equations represent?
A change at an electrode.
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What can electrolysis be used for?
Electroplating
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What can affect electrolysis?
Concentration of solution, distance between electrodes and current.
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What is electroplating?
a thin layer of one metal deposits on the surface of another through electrolysis
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What are the benefits of electroplating?
More attractive appearance , cheaper than a pure metal, improved resistance to corrosion.
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