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IGCSE CIE - Chemistry Revision Cards - Electricity and chemistry Topic 6
Terms in this set (15)
The breaking down of a compound using an electric current
An electrolyte is the compound that conducts electricity when molten and breaks down during electrolysis
A stable or un-reactive substance when placed under specific conditions
Electrodes are rods that carry the electric current to and from the electrolyte
This is the positive electrode
This is the negative electrode
Why does an ionic compound need to be melted or dissolved in order to perform electrolysis?
Because a solid substance will not be able to move to either of the electrodes due to the inter-molecular forces in between the atoms which is too strong to be separated using electrolysis
After electrolysis, what are the products of aluminium oxide in each electrode?
After electrolysis, what are the products of copper bromide in each electrode?
After electrolysis, what are the products of sodium chloride in each electrode?
After electrolysis, what are the products of zinc chloride in each electrode?
A halogen refers to one of the 5 non-metals in group 7 of the periodic 7, these include fluorine, chlorine, bromine, iodine and astatine.
A halide refers to a salt made from any halogen and a metal
Why may the products of electrolysis be different when a compound is dissolved in water and when a compound is melted?
This is because when a compound is dissolved it will have additional oxygen and hydrogen atoms within the aqueous solution, possibly causing the hydrogen atoms to be given off instead
It is when an electric current is passed through usually a cheap metal in order to coat the outer surface with a more expensive metal such as. gold or silver
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