\(Zn + H_2SO_4 \to ZnSO_4 + H_2\\ n_{Zn} = n_{ZnSO_4} = n_{H_2} = \dfrac{6,72}{22,4} = 0,3(mol)\\ m_{Zn} = 0,3.65 = 19,5(gam)\\ m_{ZnSO_4} = 0,3.161 = 48,3(gam)\)

a) Zn+H₂SO₄→ZnSO₄+H₂

b) Ta có : V_H2= 6,72(l) → n_H2= n_Zn=n_ZnSO4=\(\dfrac{6,72}{22,4}\)=0,3(mol)

m_Zn=0,3.65=19,5(gam)

m_ZnSO4=0,3.161=48,3(gam)

\(n_{Fe} =\dfrac{11,2}{56} = 0,2(mol)\\ \)

Fe + 2HCl → FeCl₂ + H₂

0,2.....0,4.........0,2........0,2..............(mol)

Vậy :

V = 0,2.22,4 = 4,48(lít)

\(m_{FeCl_2} = 0,2.127=25,4(gam)\)

\(m_{HCl} = 0,4.36,5 = 14,6(gam)\)

PTHH: Fe+2HCl → FeCl2+H2

a, nFe=m:M=11,2:56=0,2 mol

Theo PTHH, nFe=nH2=0,2 mol

VH2=n.22,4=0,2.22,4=4,48 lít

b, Theo PTHH, nFeCl2=nFe=0,2

mFeCl2=n.M=0,2.127=25,4 g 

c,

Theo PTHH, nHCl=2nFe=0,4 mol

mHCl=n.M=0,4.36,5=14,6 g

PT: \(Fe+2HCl\rightarrow FeCl_2+H_2\)

Ta có: \(n_{Fe}=\dfrac{11,2}{56}=0,2\left(mol\right)\)

Theo PT: \(\left\{{}\begin{matrix}n_{H_2}=n_{FeCl_2}=n_{Fe}=0,2\left(mol\right)\\n_{HCl}=2n_{Fe}=0,4\left(mol\right)\end{matrix}\right.\)

a, Ta có: \(V_{H_2}=0,2.22,4=4,48\left(l\right)\)

b, \(V_{ddHCl}=\dfrac{0,4}{1,5}\approx0,267\left(l\right)\)

c, \(m_{FeCl_2}=0,2.127=25,4\left(g\right)\)

Bạn tham khảo nhé!

a) Fe + 2HCl --> FeCl₂ + H₂

b) \(n_{H_2}=\dfrac{8,96}{22,4}=0,4\left(mol\right)\)

\(n_{HCl\left(bđ\right)}=\dfrac{36,5}{36,5}=1\left(mol\right)\)

PTHH: Fe + 2HCl --> FeCl₂ + H₂

           0,4<--0,8<----0,4<----0,4

=> m_HCl(dư) = (1-0,8).36,5 = 7,3 (g)

c) m_Fe = 0,4.56 = 22,4 (g)

m_FeCl2 = 0,4.127 = 50,8 (g)

a)

$Fe + 2HCl \to FeCl_2 + H_2$

$n_{Fe} = n_{H_2} = \dfrac{3,36}{22,4} = 0,15(mol)$
$m_{Fe} = 0,15.56 = 8,4(gam)$

b) $n_{HCl} = 2n_{H_2} = 0,3(mol)$
$\Rightarrow m_{HCl} = 0,3.36,5 = 10,95(gam)$

c) 

Cách 1 : $n_{FeCl_2} = n_{H_2} = 0,15(mol) \Rightarrow m_{FeCl_2} = 0,15.127 = 19,05(gam)$

Cách 2 : Bảo toàn khối lượng, $m_{FeCl_2} = 8,4 + 10,95 - 0,15.2 = 19,05(gam)$

Cíuuuu mn oiii

Fe + 2HCl -> FeCl2 + H2 

\(n_{Fe}=\dfrac{1,68}{56}=0,03\left(mol\right)\\ Fe+2HCl\rightarrow FeCl_2+H_2\\ 0,03....0,06.....0,03.......0,03\left(mol\right)\\ a,V_{H_2\left(đktc\right)}=0,03.22,4=0,672\left(l\right)\\ b,m_{HCl}=0,06.36,5=2,19\left(g\right)\\ c,m_{FeCl_2}=127.0,03=3,81\left(g\right)\)

\(a,n_{Fe}=\dfrac{1,68}{56}=0,03\left(mol\right)\)

\(PTHH:Fe+2HCl\rightarrow FeCl_2+H_2\\ \Rightarrow n_{H_2}=n_{Fe}=0,03\left(mol\right)\\ \Rightarrow V_{H_2\left(đktc\right)}=0,03\cdot22,4=0,672\left(l\right)\\ b,n_{HCl}=2n_{Fe}=0,06\left(mol\right)\\ \Rightarrow m_{HCl}=0,06\cdot36,5=2,19\left(g\right)\\ c,n_{FeCl_2}=n_{Fe}=0,03\left(mol\right)\\ \Rightarrow m_{FeCl_2}=0,03\cdot127=3,81\left(g\right)\)

\(Fe+2HCl\rightarrow FeCl_2+H_2\\ a.n_{Fe}=\dfrac{1,68}{56}=0,03\left(mol\right)\\ n_{H_2}=n_{Fe}=0,03\left(mol\right)\\ \Rightarrow V_{H_2}=0,03.22,4=0,672\left(l\right)\\ b.n_{HCl}=2n_{Fe}=0,06\left(mol\right)\\ m_{HCl}=0,06.36,5=2,19\left(g\right)\\ c.n_{FeCl_2}=n_{Fe}=0,03\left(mol\right)\\ m_{FeCl_2}=0,03.127=3,81\left(g\right)\)

Fe + 2HCl \(\rightarrow FeCl_2+H_2\)

a) nFe = \(\dfrac{5,6}{56}=0,1mol\)

Theo pt nH₂ = nFe = 0,1 mol

=> VH₂ = 0,1.22,4 = 2,24 lít

b) Theo pt: nFeCl₂ = nFe = 0,1 mol

=> mFeCl₂ = 0,1.127 = 12,7g

c) Theo pt : nHCl = 2nFe = 0,2 mol

=> mHCl = 0,2.36,5 = 7,3g