1 3 3

: Arsenic

  1. #1

    Jul 2011
    -
    936

    Arsenic



    , , 18 .
    arsenic As , .
    " "
    " Orpiment " . .

    *
    :

    " "
    _ : , , , ., , , .
    ,
    .

    *
    :

    " "
    :
    As2S3 ( ) , As2S2 ( ) ,
    ., . 817 613 , 119 , .

    *
    :

    " "
    " " " " . : , , " " , , . .

    " " " " , . " " " " .

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    ( ) , .
    : , 11 .




    * : 33
    * : 74.92
    * : 1S2 2S2 2P6 3S2 3P6 4S2 3d10 4p3 * : 4
    * : 5

  2. #2

    Jul 2011
    -
    936

    : Arsenic

    * :

    FeAsS " " .

    * :

    :
    FeAsS = FeS + As

    * :

    1 . :

    As2O3 As2O5 , .
    :

    2 FeAsS + 5 O2 .>> Fe2O3 + 2 SO2 + As2O3
    , .
    . , NaAsO2 :
    NaAsO2 + AgNO3 >> NaNO3 + AgAsO2
    " " Cu(OAc)2 . 3Cu(AsO2)2 .2 .

    2 . :

    , :
    As(OH)3 + 3 HCl = AsCl3 + 3 H2O

    3 . :

    :
    As2S3 , As2S5 , As4S4 , As4S3
    / :
    2 As + 3 H2S >> As2S3 + 3 H2
    .

    4 . ( ) AsH3 :
    :
    As2O3 + 6 Zn + 6 H2SO4 .>> 2 AsH3 + 6 ZnSO4 + 3 H2O
    ( ) :
    2 AsH3 = 2 As + 3 H2
    " " .
    :
    AsH3 + 6 AgNO3 + 3 H2O .>> 6 Ag + As(OH)3 + 6 HNO3
    [color=#663399] " "

  3. #3

    Jul 2012
    5,302

    : Arsenic



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