A Voltaic Cell Consists of an Au/Au³⁺ Electrode (E° =

A voltaic cell consists of an Au/Au³⁺ electrode (E° = 1.50 V) and a Cu/Cu²⁺ electrode (E° = 0.34 V) . Calculate [Au³⁺] if [Cu²⁺] = 1.20 M and E_cell = 1.15 V at 25°C.

A) 0.0010 M
B) 0.0020 M
C) 0.010 M
D) 0.020 M
E) 0.41 M