IB Chemistry SL 3.2.5 Electrodes in electrochemical cells
IB Chemistry SL 3.2.5 Electrodes in electrochemical cells
Interpret electrochemical cell diagrams by identifying electrodes, tracking electron and ion movement, and predicting what changes at each electrode.
How this is tested
- identify anode and cathode in voltaic and electrolytic cells, and state that reduction occurs at the cathode
- deduce electron flow and salt-bridge ion movement, e.g. electrons from Ni to Ag and anions to Fe half-cell
- predict electrode changes from the setup, including mass gain or loss and the half-equation at each electrode