\(n_{HCl}=0.2\cdot1=0.2\left(mol\right)\)

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

\(........0.2..............0.1\)

\(V_{H_2}=0.1\cdot22.4=2.24\left(l\right)\)

\(n_{CuO}=\dfrac{16}{80}=0.2\left(mol\right)\)

\(CuO+H_2\underrightarrow{^{t^0}}Cu+H_2O\)

\(0.1.......0.1....0.1\)

\(\Rightarrow CuOdư\)

\(m_{Cu}=0.1\cdot64=6.4\left(g\right)\)

a)

$Zn + H_2SO_4 \to ZnSO_4 + H_2$
Theo PTHH : 

$n_{H_2} = n_{Zn} = \dfrac{6,5}{65} = 0,1(mol)$
$V_{H_2} = 0,1.22,4 = 2,24(lít)$

b) $n_{H_2SO_4} = n_{Zn} = 0,1(mol)$
$V_{dd\ H_2SO_4} = \dfrac{0,1}{1} = 0,1(lít)$

c) $n_{ZnSO_4} = 0,1(mol) \Rightarrow m_{ZnSO_4} = 0,1.161 = 16,1(gam)$

d) $C_{M_{ZnSO_4}} = \dfrac{0,1}{0,1} = 1M$

\(4.a/n_{Al}=\dfrac{5,4}{27}=0,2mol\\ 2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\)

0,2       0,3                  0,1                  0,3

\(V_{H_2}=0,3.24,79=7,437l\\ b/C_{\%H_2SO_4}=\dfrac{0,3.98}{150}\cdot100=19,6\%\\ c/m_{Al_2\left(SO_4\right)_3}=0,1.342=34,2g\)

\(5.a/n_{MgO}=\dfrac{4}{40}=0,1mol\\ MgO+2HCl\rightarrow MgCl_2+H_2O\)

0,1            0,2             0,1              0,1

\(C_{\%HCl}=\dfrac{0,2.36,5}{200}\cdot100=3,65\%\\ b/C_{\%MgCl_2}=\dfrac{0,1.95}{200+4}\cdot100=4,66\%\\ c/NaOH+HCl\rightarrow NaCl+H_2O\\ n_{NaOH}=n_{HCl}=0,2mol\\ V_{NaOH}=\dfrac{0,2}{1}=0,2l=200ml\)

a) \(Mg+2HCl\rightarrow MgCl_2+H_2\)

\(n_{Mg}=\dfrac{2,4}{24}=0,1\left(mol\right)\)

Theo PTHH ta có: \(n_{MgCl_2}=n_{Mg}=0,1\left(mol\right)\)

\(\Rightarrow m_{MgCl_2}=n_{MgCl_2}.M_{MgCl_2}=0,1.95=9,5\left(g\right)\)

b) Theo PTHH ta có: \(n_{H_2}=n_{Mg}=0,1\left(mol\right)\)

\(\Rightarrow V_{H_2}=n_{H_2}.22,4=0,1.22,4=2,24\left(l\right)\)

c) \(2H_2+O_2\rightarrow2H_2O\)

Theo PTHH: \(n_{H_2O}=\dfrac{0,1.2}{2}=0,1\left(mol\right)\)

\(\Rightarrow m_{H_2O}=n_{H_2O}.M_{H_2O}=0,1.18=1,8\left(g\right)\)

a)mMg= 2,4/24=0,1(mol) nMgCl2=0,1.1/1=0,1 (mol) mMgCl2= 0,1.95=9,5(g) b)nH2=0,1.1/1=0,1(mol) v=n.22,4=2,24(lít

\(m_{H2SO4}=14,7\left(g\right)\Rightarrow n_{H2SO4}=\dfrac{14,7}{98}=0,15\left(mol\right)\)

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

      0,1         0,15                               0,15

a) \(m_{Al}=0,1.27=2,7\left(g\right)\)

b) \(V_{H2\left(dkc\right)}=0,15.24,79=3,7185\left(l\right)\)

 Chúc bạn học tốt

\(C\%_{ddH_2SO_4}=\dfrac{m_{ct}}{m_{dd}}\cdot100\%=\dfrac{m_{ct}}{73,5}\cdot100\%=20\%\\ =>m_{H_2SO_4}=14,7\left(g\right)\\ n_{H_2SO_4}=\dfrac{m}{M}=\dfrac{14,7}{98}=0,15\left(mol\right)\\ PTHH;2Al+3H_2SO_4->Al_2\left(SO_4\right)_3+3H_2\)

tỉ lệ          2    :      3          :       1             :  3

n(mol)    0,1<----0,15--------->0,05--------->0,15

`n_(Al)=n*M=0,1*27=2,7(g)`

\(V_{H_2\left(dkc\right)}=n\cdot22,4=0,15\cdot24,79=3,7185\left(l\right)\)

nAl = 5.4/27 = 0.2 mol 

2Al + 3H2SO4 => Al2(SO4)3 + 3H2 

0.2______________0.1________0.3 

VH2 = 0.3*22.4 = 6.72 (l) 

mAl2(SO4)3 = 0.1*342 = 34.2 g 

\(a) Fe + 2HCl \to FeCl_2 + H_2\\ b) n_{H_2} = n_{Fe} = \dfrac{5,6}{56} = 0,1(mol)\\ V_{H_2} = 0,1.22,4 = 2,24(lít)\\ c) n_{FeCl_2} = n_{Fe} = 0,1(mol)\\ m_{FeCl_2} = 0,1.127 = 12,7(gam)\\ d) n_{HCl} = 2n_{Fe} = 0,2(mol) \Rightarrow C_{M_{HCl}} = \dfrac{0,2}{0,1} = 2M\\ e)n_{Fe_3O_4} = \dfrac{2,32}{232} = 0,01(mol)\\ Fe_3O_4 + 4H_2 \xrightarrow{t^o} 3Fe + 4H_2O\\ 4n_{Fe_3O_4} = 0,04 < n_{H_2} = 0,1 \to H_2\ dư\\ \)

\(n_{Fe} = 3n_{Fe_3O_4} = 0,03(mol)\\ m_{Fe} = 0,03.56 = 1,68(gam)\)

giúp mik câu e với ạ

a. \(n_{Zn}=\dfrac{19.5}{65}=0,3\left(mol\right)\)

PTHH : Zn + H₂SO₄ -> ZnSO₄ + H₂

            0,3                          0,3     0,3

b. \(V_{H_2}=0,3.22,4=6,72\left(l\right)\)

c. \(m_{ZnSO_4}=1=0,3.161=48,3\left(g\right)\)