Redox (HL + SL)
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What is the Gibbs free energy equation for redox? (voltaic cell)
Example Gibbs free energy for Zn and Cu voltaic cell.
What is electrolysis?
Electrolysis = Decomposition of ionic compounds using electricity
Why must ionic compound be molten or dissolved?
So ions can move to complete circuit & carry charge.
What is Electrolyte?
Electrolyte = Liquid that conducts electricity
What is oxidation and reduction?
Oxidation = loss of electrons Reduction = gain of electrons OIL RIG
Why do ions go to electrodes?
Opposite charges attract +ve ions attracted to -ve electrode -ve ions attracted to +ve electrode
What happens to ions at electrodes?
Ions are discharge (they grain/lose electrons so they have no charge)
Draw a electrolysis diagram.
Which are discharged: the + ion from the compound the H^+ ions from the water?
Which are discharged: the - ion from the compound the OH^- ions from the water?
What is electroplating?
