• 2021-04-14
    【单选题】已知 φ θ (Fe 3+ /Fe 2+ ) = 0.771V , φ θ (Fe 2+ /Fe) = -0.41V , φ θ (Sn 4+ /Sn 2+ ) = 0.15V , φ θ (Sn 2+ /Sn)= -0.14V ,在标准状态下,下列反应不能正向进行的是 ()
    A. Fe 3+ +Fe = 2Fe 2+
    B. Fe 2+ +Sn = Fe+Sn 2+
    C. 2Fe 3+ +Sn 2+ = 2Fe 2+ +Sn 4+
    D. Sn 4+ +2Fe = Sn 2+ +2Fe 2+