`a)PTHH:`

`2Al + 6HCl -> 2AlCl_3 + 3H_2`

`0,2`     `0,6`                               `0,3`       `(mol)`

`n_[Al]=[5,4]/27=0,2(mol)`

`b)V_[H_2]=0,3.22,4=6,72(l)`

`c)m_[dd HCl]=[0,6.36,5]/10 . 100 =219(g)`

n_Al  = \(\dfrac{5,4}{27}\) = 0,2 (mol)

 2Al + 6HCl -> 2AlCl₃ + 3H₂

     0,2     0,6       0,2      0,3

=>VH2=0,3.22,4=6,72l

=>mHcl=0,6.36,5=21,9g

=>mdd=219g

nAl = 5.4/27 = 0.2 (mol) 

2Al + 6HCl => 2AlCl3 + 3H2 

0.2........0.6.........0.2.........0.3

VH2 = 0.3*22.4 = 6.72 (l) 

mAlCl3 = 0.2*133.5 = 26.7 (g) 

2Al+6HCl-->2AlCl₃+3H₂

0,3----0,9---------0,3------0,45

=>n _Al=8,1\17=0,3 mol

=>V_H2=0,45.22,4=10,08l

=>m _HCl=0,9.26,5=32,85g

=>m_AlCl3=0,3.133,5=40,05g

C2 :Bảo Toàn khối lượng 

=>m _AlCl3=40,05g

B nha

a. 2Al + 6HCl -> 2AlCl₃ + 3H₂

b. n_Al = \(\dfrac{8.1}{27}=0,3\left(mol\right)\)=> \(n_{H_2}=\dfrac{3}{2}.0,3=0,45\left(mol\right)\)

\(V_{H_2}=0,45.22,4=10,08\left(mol\right)\)

c. \(n_{HCl}=3n_{Al}=3.0,3=0,9\left(mol\right)=>m_{HCl}=0,9.36,5=32,85\left(g\right)\)

Vậy m = 32,85

PTHH: 2Al + 6HCl -> 2AlCl3 + 3H2 

nAl = 5.4/27= 0.2mol

Theo ptpư : nH2 = 3/2 nAl = 3/2.0.2 = 0.3 mol 

=> VH2 = 0.3.22.4= 6.72 (lít)

HCl dư , tính theo Al 

nAlCl3 = nAl = 0.2 mol 

mAlCl3 = 0.2×133.5= 26.7 g 

CHÚC BẠN HỌC TỐT:3

a) pt: 2Al + 6HCl \(\rightarrow\) 2AlCl₃ + 3H₂

nAl = \(\dfrac{5,4}{27}=0,2mol\)

Theo pt: nH₂ = \(\dfrac{3}{2}nAl=0,3mol\)

=> VH₂ = 0,3.22,4 = 6,72lit

c) nHCl = 3nAl = 0,6mol

=> mHCl = 21,9g

=> C% = \(\dfrac{21,9}{200}.100\%=10,95\%\)

d) Bảo toàn khối lượng

mdung dich muối = mAl + mHCl - mH2

= 5,4 + 200 - 0,3.2 = 204,8g

Theo pt:nAlCl_3 ⁼ nAl = 0,2mol

=> mAlCl₃ = 0,2.133,5 = 26,7g

=> C%dd muối = \(\dfrac{26,7}{204,8}.100\%=13,03\%\)

e) H₂ + CuO \(\xrightarrow[]{t^o}\) Cu + H₂O

nCu = nH₂ = 0,3mol

=> mCu = 0,3.64 = 19,2g

ở ngoài ko thấy chỗ C% nên ấn vào câu hỏi mới ra nha

\(n_{Al}=\dfrac{m_{Al}}{M_{Al}}=\dfrac{5,4}{27}=0,2mol\)

\(2Al+6HCl\rightarrow2AlCl_3+3H_2\)

0,2                      0,2          0,3    ( mol )

\(V_{H_2}=n_{H_2}.22,4=0,3.22,4=6,72l\)

\(m_{AlCl_3}=n_{AlCl_3}.M_{AlCl_3}=0,2.133,5=26,7g\)

B là khí hi đro nha

\(n_{Al}=\dfrac{13.5}{27}=0.5\left(mol\right)\)

\(2Al+6HCl\rightarrow2AlCl_3+3H_2\)

\(0.5........................0.5......0.75\)

\(a.\)

\(m_{AlCl_3}=0.5\cdot133.5=66.75\left(g\right)\)

\(b.\)

\(V_{H_2}=0.75\cdot22.4=16.8\left(l\right)\)

\(c.\)

\(n_{FeO}=\dfrac{64.8}{72}=0.9\left(mol\right)\)

\(FeO+H_2\underrightarrow{t^0}Fe+H_2O\)

\(0.75.....0.75...0.75\)

\(\Rightarrow FeOdư\)

\(m_{Fe}=0.75\cdot56=42\left(g\right)\)

a)mol Al= 0.5

pthh:     2Al + 6HCl -----> 2AlCl\(_3\) + 3H\(_2\)

0.5mol Al= 0,5 mol AlCl\(_3\) ---> m\(_{AlCl}\)\(_3\)=0,5*(27+35,5*3)=66.75

c) pthh:   FeO + H\(_2\) --\(^{to}\)-> Fe + H\(_2\)O

mol\(_{FeO}\)=64,8/(56+16)=0,9

mol\(_{H_{ }2}\)=0.75

mol\(h2\)<mol\(_{FeO}\)---->H2 hết,   FeO dư

m\(_{Fe}\)=0,75*56=42(g)

 PTHH: \(2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\uparrow\)

Làm gộp các phần còn lại

Ta có: \(n_{Al}=\dfrac{5,4}{27}=0,2\left(mol\right)\) \(\Rightarrow\left\{{}\begin{matrix}n_{Al_2\left(SO_4\right)_3}=0,1mol\\n_{H_2SO_4}=n_{H_2}=0,3mol\end{matrix}\right.\)

\(\Rightarrow\left\{{}\begin{matrix}V_{H_2}=0,3\cdot22,4=6,72\left(l\right)\\m_{Al_2\left(SO_4\right)_3}=0,1\cdot342=34,2\left(g\right)\\m_{H_2SO_4}=0,3\cdot98=29,4\left(g\right)\end{matrix}\right.\)