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REDOX REACTIONS - Coggle Diagram
REDOX REACTIONS
KOHES
K: key element
O: oxygen
H: hydrogen
E: electrons
S: states
BALANCING REDOX EQUATIONS
oxidation
loss
electrons
increase
oxidation number
written also as
substance being oxidised
metals
oxidised
easily
sodium
magnesium
iron
corrosion
Reducing agents
cause reduction
undergo oxidation
= reductants
donate electrons
Oxidising agents
cause oxidation
undergo reduction
= oxidants
accept electrons
reduction
gain
electrons
decrease
oxidation number
written also as
substance being reduced
GALVANIC CELLS
anode
oxidation
negative
becomes
more positive
cathode
reduction
positive
becomes
more negative
electron flow
anode to cathode
overall equations
oxidation and reduction occur at same time
conjugate redox pairs
EXAMPLE
half equation: Zn(s) --> Zn2+(aq) + 2e-
conj redox pair: Zn(s) and Zn2+(aq)
half equations
electrochemical series