Concentration cell → same electrodes, different concentrations
Recall that a cell notation is written from anode (oxidation) to cathode (reduction):
lose electrons → oxidation → anode
gain electrons → reduction → cathode
Zn(s)|Zn2+(aq,0.100 M)|| Zn2+ (aq, ? M)|Zn(s)
Modified Nernst Equation:
The voltage generated by the zinc concentration cell described by.
Zn(s)|Zn2+(aq,0.100 M)|| Zn2+ (aq,? M)|Zn(s)
is 13.0 mV at 25 °C. Calculate the concentration of the Zn2+(aq) ion at the cathode.
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