Question

cho 6g hon hop gom Fe,Cu vao 100ml HCL 1,5M,phan ung ket thuc thu duoc 1,12l khis (dktc) 

a, viet phuong trinh phan ung 

b, tinh khoi luong moi kim loai co trong hon hop ban dau 

c, tinh cm cua dd thu duoc sau phan ung ( co the coi the tichj cua dd sau phan ung thay doi khong dang ke so voi the tich HCL da dung)

Answer 1

`a)`

`Fe + 2HCl -> FeCl_2 + H_2 \uparrow`

`0,05`   `0,1`        `0,05`    `0,05`        `(mol)`

`Cu + HCl -xx->`

`n_[HCl]=1,5.0,1=0,15(mol)`

`n_[H_2]=[1,12]/[22,4]=0,05(mol)`

`b)m_[Fe]=0,05.56=2,8(g)`

`=>m_[Cu]=6-2,8=3,2(g)`

`c)C_[M_[FeCl_2]]=[0,05]/[0,1]=0,5(M)`

   `C_[M_[HCl (dư)]]=[0,15-0,1]/[0,1]=0,5(M)`