Download SUMMARY: Electrochemical Reaction.

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Learners must be able to define galvanic cell in terms
of electrode reaction. e.g. salt bridge .(N.B. anode and
cathode)
Learners must be able to do the conversion of chemical
energy to electrical energy. e.g. copper zinc cell.
Learners must define electrolytic cell in terms of
electrode reaction that are sustained by supply of
electrical energy into chemical energy. e.g. porous
membrane. (anode, cathode).
Learners must be able to define oxidation reduction in
terms of electron transfer. e.g. copper zinc cell.
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Anode
Zn → Zn2+ + 2e- oxidation
Cathode Cu2+ + 2e- → Cu reduction
Relative of current and potential to rate and
equilibrium
Learners must be able to explain the
relationship between current in an
electrochemical cell and the rate of reaction.
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An experiment to perform using different
electrodes. i.e. copper, zinc, magnesium and
carbon and necessary solutions.
State the pd cell related to spontaneous
reaction at equilibrium.
Use the qualitative relationship between v and
the concentration of product and the reactants
ions for the spontaneous reaction namely: v
decreases while concentration of product ions
increases, concentration of reactant ions
decreases until equilibrium as reached at which
v=o.
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Learners must understand the description of
the movement of ions through solutions.
Electron flow in the external circuit of the cell
and their relation to the half reaction at the
electrode .
Function of the salt – bridge.