铁钉可以镀铜,铁钉可以镀锌吗? Fe+ Cu2+->Fe 2++ Cu E(cel)=E(正极)E°(负极)=0,34-(-0.45) =0.79V Fe+Zn 2+->Fe 2++ Zn E(ce)=E(正极)一E°(负极)=(-0.76)-(-0.45) 0.31铁钉可以镀铜,铁钉可以镀锌吗? Fe + Cu 2+ ⎯→ Fe 2++ Cu E(cell) = E(正极)-E(负极) = 0.34 − (− 0.45) = 0.79 V Fe + Zn 2+ ⎯→ Fe 2++ Zn E(cell) = E(正极)-E(负极) = (− 0.76) − (− 0.45) = − 0.31