17. NEED HELP FAST

Question

The voltage generated by the zinc concentration cell described by the line notation

Zn(s) ∣ Zn2+(aq,0.100 M) ‖ Zn2+(aq,? M) ∣ Zn(s)

is  19.0 mV  at  25 °C.  Calculate the concentration of the  Zn2+(aq)  ion at the cathode.

concentration:

Answer 1

The key to solving this problem requires the use of the Nernst equation:

E = E^o - (0.0592/n) log([Oxid]/[Red])

Since both electrodes are the same, E^o would be zero.

Since this is a 2-electron process, n = 2

The [Oxid} would be .100 M.

Convert the voltage from mV to V and substitute the values. Then solve for the log and complete the calculation.

log (.100/x) = 19.0 mV/(0.0592/2)