The voltage generated by the zinc concentration cell described by the line notation Zn(s)/Zn²⁺(aq, 0.100M)//Zn²⁺(aq, ?M)/Zn(s) is 22.0 mV at 25°C. Calculate the concentration of the Zn²⁺(aq) ion at the cathode.
a) 0.050M
b) 0.100M
c) 0.150M
d) 0.200M