試題詳解

8. An electrochemical cell consists of an iron metal electrode immersed in a 1.0 M FeSO₄ solution, separated by a porous disk from a copper metal electrode. If the copper electrode is placed in a solution of 2.0 M NH₃ (aq), which contains 0.010 M [Cu(NH₃)₄]²⁺, what is the cell potential at 25°C? (The standard reduction potentials are 0.34 V for Cu²⁺/Cu and -0.44 V for Fe²⁺/Fe, respectively. log2 =0.301)
Cu²⁺(aq) + 4 NH₃(aq)= Cu(NH₃)₄²⁺(aq)    K=1.0x10¹³
(A)-0.18 V
(B)0.30 V
(C)0.44 V
(E)1.26 V
(D)0.68 V