\(n_{Zn}=\dfrac{13}{65}=0,2mol\)

\(Zn+2HCl\rightarrow ZnCl_2+H_2\)

0,2      0,4          0,2         0,2

\(V_{H_2}=0,2\cdot22,4=4,48l\)

\(m_{HCl}=0,4\cdot36,5=14,6g\)

c)Cho dẫn qua copper (ll) oxit:

\(CuO+H_2\rightarrow Cu+H_2O\)

0,2       0,2      0,2       0,2

\(m_{Cu}=0,2\cdot64=12,8g\)

a) Giả sử hỗn hợp chỉ có Zn => nhh = nZn = 10/65 ~ 0,154 mol

=> nHCl = 2nZn = 0,308(mol) > nHCl(theo đề) =0,14 mol 

=> HCl phản ứng hết còn hỗn hợp kim loại dư 

Ta có : nB = nCu = nCuO = nH2 = 1/2 nHCl = 0,07 (mol) => mB = mCu = 0,07.64 = 4,48 < 12,48 

=> Trong B còn có CuO dư => x = 12,48 - 4,48 + 0,07.80 = 13,6(g) 

b)Theo đề có : 

 nNaOH = 0,1(mol) ;nCuO = 0,1 mol 

=> nHCl = 0,1 + 0,1.2 = 0,3 mol ; nCuCl2 = 0,1 mol

Mà \(C\%_{CuCl2}=\dfrac{0,1.135}{mdd}.100=27\%\) => mdd = 50(g) => mdd HCl = 50-8=42(g)

=> y = C%HCl = (10,95/42).100~26,071%

\(H_2S + CuSO_4 \to CuS + H_2SO_4\)

\(n_{H_2S} = n_{CuSO_4} = \dfrac{800.1,2.10\%}{160} = 0,6(mol)\\\)

Gọi : \(\left\{{}\begin{matrix}n_{Fe}=a\left(mol\right)\\n_{Zn}=b\left(mol\right)\end{matrix}\right.\)⇒ 56x + 65b = 37,2(1)

\(Fe +S \xrightarrow{t^o}FeS\\ Zn + S\xrightarrow{t^o}ZnS\\ FeS + 2HCl \to FeCl_2 + H_2S\\ ZnS + 2HCl \to ZnCl_2 + H_2S\\\)

Theo PTHH : 

\(n_{H_2S} = a + b = 0,6(2)\)

Từ (1)(2) suy ra a = 0,2; b = 0,4

Vậy :

\(m_{Fe} = 0,2.56 = 11,2(gam)\\ m_{Zn} = 0,4.65 = 26(gam)\)

Ta có: \(n_{H_2}=\dfrac{10,08}{22,4}=0,45\left(mol\right)\)

PT: \(Fe+2HCl\rightarrow FeCl_2+H_2\)

a, \(n_{Fe}=n_{H_2}=0,45\left(mol\right)\Rightarrow m_{Fe}=0,45.56=25,2\left(g\right)\)

b, \(n_{HCl}=2n_{H_2}=0,9\left(mol\right)\) \(\Rightarrow C_{M_{HCl}}=\dfrac{0,9}{0,15}=6\left(M\right)\)

c, \(FeCl_2+2NaOH\rightarrow Fe\left(OH\right)_2+2NaCl\)

\(4Fe\left(OH\right)_2+O_2\underrightarrow{t^o}2Fe_2O_3+4H_2O\)

Theo PT: \(n_{Fe_2O_3}=\dfrac{1}{2}n_{Fe\left(OH\right)_2}=\dfrac{1}{2}n_{FeCl_2}=\dfrac{1}{2}n_{H_2}=0,225\left(mol\right)\)

\(\Rightarrow m_{Fe_2O_3}=0,225.160=36\left(g\right)\)

a) $Zn + 2HCl \to ZnCl_2 + H_2$

b) Theo PTHH : $n_{H_2} = n_{Zn} = \dfrac{16,25}{65} = 0,25(mol)$
$\Rightarrow V_{H_2} = 0,25.22,4 = 5,6(lít)$

c) $n_{HCl} = 2n_{Zn} = 0,5(mol)$
$\Rightarrow C_{M_{HCl}} = \dfrac{0,5}{0,5} = 1M$

nFe = 16,8/56 = 0,3 (mol)

PTHH: Fe + 2HCl -> FeCl2 + H2

Mol: 0,3 ---> 0,6 ---> 0,3 ---> 0,3

VH2 = 0,3 . 24,79 = 7,437 (l)

mHCl = 0,6 . 36,5 = 21,9 (g)

PTHH: CuO + H2 -> (t°) Cu + H2O

Mol: 0,3 <--- 0,3 ---> 0,3

mCu = 0,3 . 64 = 19,2 (g)

mFe = 16,8: 56 =0,3(mol) 
pthh : Fe + 2HCl --> FeCl2 + H2 (1)
         0,3 ->0,6-----------------> 0,3 (mol) 
=> VH2 (đkc) = 0,3 . 24,79 ( l) 
=> mHCl = 0,6 . 35,5 = 21,9 (g) 
pthh : CuO + H2 -t--> Cu+ H2O
           0,3<-----0,3 (mol) 
=>mCu = 0,3 . 64 = 19,2 (g)

 

\(n_{Fe}=\dfrac{16,8}{56}=0,3mol\)

\(Fe+2HCl\rightarrow FeCl_2+H_2\uparrow\)

0,3    0,6          0,3          0,3

\(V_{H_2}=0,3\cdot22,4=6,67l\)

\(m_{HCl}=0,6\cdot36,5=21,9g\)

\(CuO+H_2\rightarrow Cu+H_2O\)

0,3       0,3       0,3

\(m_{Cu}=0,3\cdot64=19,2g\)

\(a,PTHH:Zn+2HCl\rightarrow ZnCl_2+H_2\\ n_{HCl}=1\cdot0,2=0,2\left(mol\right)\\ \Rightarrow n_{H_2}=\dfrac{1}{2}n_{HCl}=0,1\left(mol\right)\\ \Rightarrow V_{H_2\left(đktc\right)}=0,1\cdot22,4=2,24\left(l\right)\\ b,PTHH:CuO+H_2\rightarrow^{t^o}Cu+H_2O\\ \Rightarrow n_{Cu}=n_{H_2}=0,1\left(mol\right)\\ \Rightarrow m_{Cu}=0,1\cdot64=6,4\left(g\right)\)

`a)`

PTHH : `Zn + 2HCl -> ZnCl_2 + H_2`

`200ml = 0,2l`

`n_{HCl} = 0,2 . 1 = 0,2` `mol`

`n_{H_2} = 1/2 . n_{HCl} = 0,1` `mol`

`V_{H_2} = 0,1 . 22,4 = 2,24` `l`

`b)`

`CuO + H_2 -> Cu + H_2O`

Ta có : `n_{H_2} = 0,1` `mol`

`-> n_{Cu} = n_{H_2} = 0,1` `mol`

`-> m_{Cu} = 0,1 . 64 = 6,4` `gam`

\(Fe+2HCl\rightarrow FeCl_2+H_2\\ n_{Fe}=\dfrac{5,6}{56}=0,1\left(mol\right)\\ n_{H_2}=n_{Fe}=0,1\left(mol\right)\\ n_{CuO}=\dfrac{16}{80}=0,2\left(mol\right)\\ CuO+H_2-^{t^o}\text{ }\rightarrow Cu+H_2O\\ Lậptỉlệ:\dfrac{0,2}{1}>\dfrac{0,1}{1}\\ \Rightarrow CuOdư\\n_{H_2O}=n_{H_2}=0,1\left(mol\right)\\ BTKL:m_{CuO}+m_{H_2}=m_{cr}+m_{H_2O}\\ \Leftrightarrow16+0,1.2=m_{cr}+0,1.18\\ \Rightarrow m_{cr}=14,4\left(g\right)\)