Electrolysis / Cathodes and Anodes Flashcards
define electrolysis
splitting up ionic compounds using electricity
define electrode
rod that conducts electricity in pairs , one negative and one positive
define electrolyte
ionic solution broken down by electrolysis
what does PANIC stand for
positive anode negative is cathode
what is attracted to snides
negative ions / non metals
what is attracted to cathodes
positive ions / metals
what is the half equation for an anode and a halogen ion
2__ —> __ + 2e
what is the half equation for an anode and a non halogen
4OH—> 2H20 +O2 +4e
what is produced by an anode if the ion is a halogen
a halogen
what is produced by an anode if the ion is a non halogen
oxygen
what is the cathode equation of the metal is more reactive than hydrogen
2H +2e —> H2
what is the cathode equation if the metal ion is less reactive than hydrogen
metal {3+} + {3}e —> metal
what is produced by a cathode if the metal ion is more reactive than hydrogen
hydrogen
what is produced by a cathode when the metal ion is less reactive than hydrogen
metal
what does a cryolite do
reduces the melting point of ore which means less energy is required for electrolysis