Hóa học Lớp 9: cho 5,54g hỗn hợp Al và Fe tác dung vs dd H2SO4 20 thu được 3,584 lít H2 ở đktc a) tính khối lượng mỗikim loại trog

Question

Hóa học Lớp 9:  cho 5,54g hỗn hợp Al  và Fe tác dung  vs dd H2SO4 20% thu  được 3,584  lít H2 ở đktc   a)  tính khối lượng mỗikim loại trog hỗn hợp   b)  tính khối lượng  dd  H2SO4   MK ĐG  CẦN GẤP, giúp em giải bài này ạ, em cảm ơn thầy cô và các bạn nhiều.

maianhnhiquynh · Answer

Caption

tuyethutanhthu · Answer

n   H  2    =  0  ,  16  &#160;  m  o  l   a  ,  &#160;  2  A  l  +  3   H  2   S   O  4   -  &#62;  A   l  2      S   O  4     3   +  3   H  2    &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  x  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  1  ,  5  x  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  0  ,  5  x  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  1  ,  5  x  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  (  m  o  l  )   F  e  +   H  2   S   O  4   -  &#62;  F  e  S   O  4   +   H  2    &#160;  y  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  y  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  y  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  y  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  &#160;  (  m  o  l  )   T  a  &#160;  c  &#243;  :  &#160;       27  x  +  56  y  =  5  ,  54      1  ,  5  x  +  y  =  0  ,  16     &#60;  =  &#62;      x  =  0  ,  06      y  =  0  ,  07         =  &#62;   m   A  l    =  0  ,  06  .  27  =  1  ,  62  g  =  &#62;   m   F  e    =  5  ,  54  -  1  ,  62  =  3  ,  92   V  &#7853;  y  &#160;   m   A  l    =  1  ,  62  g  ;  &#160;   m   F  e    =  3  ,  92  g   b  ,  &#160;   n    H  2   S   O  4     =   n   H  2    =  0  ,  16  &#160;  m  o  l   =  &#62;   m    H  2   S   O  4     =  0  ,  16  .  98  =  15  ,  68  g   =  &#62;   m   d  d  &#160;   H  2   S   O  4     =  15  ,  68  &#160;  :  &#160;  0  ,  2  =  78  ,  4  g     Vậy m=78,4g

Hóa học Lớp 9: cho 5,54g hỗn hợp Al và Fe tác dung vs dd H2SO4 20% thu được 3,584 lít H2 ở đktc a) tính khối lượng mỗikim loại trog

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