Dẫn V lít khí H2 chỉ nung nóng ở dktc đi qua 23,2 g,FeO4

A,viết PTHH

B,Tính V ( ở dktc)

C,tính k/lượng Fe thu đc

2 câu trả lời

a) PTHH: `Fe_3 O_4 + 4H_2`$\xrightarrow[]{t^o}$`3Fe + 4H_2 O`

b) Ta có: `n_(Fe_3 O_4) = m/M = (23,2)/232 = 0,1` (mol)

Theo PTHH, ta có:

`n_(H_2) = 4n_(Fe_3 O_4) = 4.0,1 = 0,4` (mol)

`=> V= n.22,4 = 0,4.22,4=8,96` (`l`)

c) Theo PTHH, ta có:

`n_(Fe) = 3n_(Fe_3 O_4) = 3.0,1=0,3` (mol)

`=> m_(Fe) = n.M = 0,3.56=16,8` (mol)

`n_{Fe_3O_4}={23,2}/{232}=0,1(mol)`

`a,``Fe_3O_4+4H_2` $\xrightarrow[]{t^o}$ `3Fe+4H_2O`

 `1`  `:`  `4`         `:`   `3`  `:`        `4`    `(pt)`

 `0,1` `:` `0,4`      `:`  `0,3`  `:`     `0,4`          `(mol)`

`b,` `V_{H_2(đktc)}=0,4×22,4=8,96(l)`

`c,` `m_{Fe}=0,3×56=16,8(g)`

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