3.(1)PbSO4+2H2O-2e-===PbO2+SO +4H+16 g (2)Na2SO4·10H2O(3)3Pb+8H++2NO ===3Pb2++2NO↑+4H2OHNO3 (4)4PbSO4+6NaOH PbSO4·3PbO·H2O+3Na2SO4+2H2O (5)取少量最后一次的洗涤液于洁净的试管中,向其中滴加硝酸酸化的Ba(NO3)2溶液,若产生白色沉淀,则沉淀未洗涤干净;否则,已洗涤...