(5分)用“>”或“<”填空: (1)酸性:H2CO3___________H2SiO3,H2SiO3___________H3PO4。 (2)碱性:Ca(OH)2___________Ba(OH)2,Mg(OH)2___________Al(OH)3 (3)气态氢化物稳定性:NH3___________ H2O, H2S ___________ HCl (4)还原性:HCl ___________HBr,H2S___________HCl (5)酸性:H2SO4___________H2SO3,HClO ___________ HClO4 |