• 回复: 新手提问版发帖须知

  • # 11

    mm285954 Sat, 08 May 2010 14:22:28 +0000

    试试角标  
    K2Cr2O7

  • # 12

    mm285954 Sat, 08 May 2010 14:23:42 +0000

    囧死LS了…………
    K 2    Cr   2 O  7

  • # 13

    mm285954 Sat, 08 May 2010 14:24:20 +0000

    ………………
    K2Cr2O7

  • # 14

    _氦 Sat, 08 May 2010 15:56:58 +0000

    H2O

  • # 15

    mm285954 Sat, 08 May 2010 17:01:24 +0000

    再试一次！！
    Cr2O72-
    +    SO32-     ====   Cr3+  +  SO42-