\(n_{Fe}=\dfrac{5.6}{56}=0.1\left(mol\right)\)

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

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

\(m_{FeCl_2}=0.1\cdot127=12.7\left(g\right)\)

Bảo toàn nguyên tố Fe:

\(n_{FeCl_2}=n_{Fe}=0,1\left(mol\right)\)

\(\Rightarrow m_{FeCl_2}=12,7\left(g\right)\)

\(n_{Al_2O_3}=\dfrac{10.2}{102}=0.1\left(mol\right)\)

\(n_{HCl}=0.35\cdot2=0.7\left(mol\right)\)

\(Al_2O_3+6HCl\rightarrow2AlCl_3+3H_2O\)

\(1.................6\)

\(0.1.............0.7\)

Lập tỉ lệ : \(\dfrac{0.1}{1}< \dfrac{0.7}{6}\Rightarrow HCldư\)

\(m_{AlCl_3}=0.1\cdot2\cdot133.5=26.7\left(g\right)\)

\(n_{Zn}=\dfrac{6.5}{65}=0.1\left(mol\right)\)

\(n_{H_2SO_4}=0.25\cdot1=0.25\left(mol\right)\)

\(Zn+H_2SO_4\rightarrow ZnSO_4+H_2\)

\(1..........1\)

\(0.1.........0.25\)

\(LTL:0.1< 0.25\)

\(\Rightarrow H_2SO_4dư\)

\(m_{ZnSO_4}=0.1\cdot161=16.1\left(g\right)\)

\(n_{Fe}=\dfrac{5,6}{56}=0,1(mol);n_{HCl}=1.0,3=0,3(mol)\\ Fe+2HCl\to FeCl_2+H_2\\ \)

Vì \(\dfrac{n_{Fe}}{1}<\dfrac{n_{HCl}}{2}\) nên HCl dư

Do đó \(n_{H_2}=n_{Fe}=0,1(mol)\)

\(\Rightarrow V_{H_2}=0,1.22,4=2,24(l)\)

\(n_{Fe}=\dfrac{5,6}{56}=0,1\left(mol\right);n_{HCl}=0,1.1=0,1\left(mol\right)\)

PTHH: Fe + 2HCl --> FeCl₂ + H₂

Xét tỉ lệ: \(\dfrac{0,1}{1}>\dfrac{0,1}{2}\) => HCl hết, Fe dư

PTHH: Fe + 2HCl --> FeCl₂ + H₂

___________0,1-------------->0,05_____(mol)

=> V_H2 = 0,05.22,4 = 1,12(l)

\(n_{CuO}=\dfrac{32}{80}=0,4(mol)\\ CuO+2HCl\to CuCl_2+H_2\\ \Rightarrow n_{HCl}=0,8(mol);n_{CuCl_2}=n_{H_2}=0,4(mol)\\ a,m_{dd_{HCl}}=\dfrac{0,8.36,5}{20\%}=146(g)\\ b,m_{CuCl_2}=0,4.135=54(g)\\ c,C\%_{CuCl_2}=\dfrac{54}{32+146-0,4.2}.100\%=30,47\%\)

\(CuO + 2HCl \rightarrow CuCl_2 + H_2O\)

\(n_{CuO}= \dfrac{32}{80}= 0,4 mol\)

Theo PTHH:

\(n_{HCl}= 2n_{CuO}= 0,8 mol\)

\(\Rightarrow m_{HCl}= 0,8 . 36,5=29,2 g\)

\(\rightarrow m_{dd HCl}= \dfrac{29,2 . 100%}{20%}= 146 g\)

b) Muối tạo thành là CuCl₂

Theo PTHH:

\(n_{CuCl_2}= n_{CuO}= 0,4 mol\)

\(\Rightarrow m_{CuCl_2}= 0,4 . 135= 54g\)

c)

\(m_{dd sau pư}= m_{CuO} + m_{dd HCl}= 32 + 146=178 g\)

C%= \(\dfrac{54}{178} . 100\)%= 30,337 %

\(-\) \(n_{CuO}=\dfrac{32}{80}=0,4\left(mol\right)\)

\(pt:CuO+2HCl\rightarrow CUCl_2+H_2O\)

 \(a,\) 

\(-\) \(n_{HCl}=2.n_{CuO}=2.0,4=0,8\left(mol\right)\)

\(\rightarrow\) \(m_{HCl}=0,8.36,5=29,2\left(gam\right)\)

\(\Rightarrow\) \(m_{ddHCl}=29,2:20\%=146\left(gam\right)\)

\(b,\)

\(-\) \(n_{CuCl_2}=n_{CuO}=0,4\left(mol\right)\)

\(\rightarrow\) \(m_{CuCl_2}=0,4.135=54\left(gam\right)\)

\(c,\)

\(m_{ddsaupu}=32+146=178\left(gam\right)\)

\(\Rightarrow\) \(C\%_{CuCl_2}=\dfrac{54}{178}.100\%=30,34\%\)

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

               2Al   +   6HCl   →   2AlCl₃   +   3H₂

( mol )  0,2                       →    0, 2

\(m_{AlCl_3}=n.M=0,2.\left(27+35,5\times3\right)=26,7\left(g\right)\)