Draw the Galvanic cell (salt-bridge design) and label the following:
i)anode and cathode
ii)oxidation and reduction half-reactions
iii)direction of electron flow
iv)cation and anion movement
v)net reaction
Zn(NO3)2(aq) | Zn(s) || Co(s) | Co(NO3)2(aq)
Solution:
Things to consider:
-look at the metal activity series to determine which metal will be oxidized (the metal which is higher up in the activity
series will be oxidized and the lower metal will be reduced)
-once it is determined which metal gets oxidized and reduced it is simple to write the oxidation/reduction halfreactions
-anions will always move towards the anode
-cations will always move towards the cathode
-combine the two half-reactions (make sure to balance charges)
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