electrochemistry
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define electrolysis
decomposition of an ionic compound when molten or in an aquoes solution by the passage of an electric current
what is the anode
the positive electrode in which the anions (negative ions) are attracted towards
what is the cathode
the negative electrode in which the cations (positive ions) are attracted towards
what is the electrolyte
the molten or aqueos substance that undergoes electrolysis
what are the products and observations of electrolysis of sodium chloride
formed at anode- chlorine formed at cathode- hydrogen
what are the products and if any observation of the electrolysis of molten lead bromide
formed at anode- bromine (orange-red) formed at cathode- lead (grey/silver)
what are the products and if any observation of the electrolysis of sulfuric acid
cathode- hydrogen anode- oxygen
where are metals or hydrogen formed
cathode
where are non metals other then hydrogen formed
anode
what are the 2 electrolysis rules
cathide- if metal more reactive than hydrogen than hydrogen is produced either metal anode- if OH- and halide ions present, then molecules of chlorine, bromine or iodine will be formed if there are no hallide ions than oxygen is formed
why are metal objects electroplated
to improve appearance and resistance to corrosion