\(n_{CuSO_4}=\dfrac{200.8}{100.160}=0,1(mol)\\ PTHH:Fe+CuSO_4\to FeSO_4+Cu\\ a,n_{Cu}=n_{Fe}=n_{CuSO_4}=0,1(mol)\\ \Rightarrow m_{Cu}=0,1.64=6,4(g);m_{Fe}=0,1.56=5,6(g)\\ b,n_{FeSO_4}=0,1(mol)\\ \Rightarrow C\%_{FeSO_4}=\dfrac{0,1.152}{5,6+200-6,4}.100\%=7,63\%\)

Ta có: \(m_{CuSO_4}=40.10\%=4\left(g\right)\Rightarrow n_{CuSO_4}=\dfrac{4}{160}=0,025\left(mol\right)\)

PT: \(Zn+CuSO_4\rightarrow ZnSO_4+Cu\)

Theo PT: \(n_{Zn}=n_{ZnSO_4}=n_{Cu}=n_{CuSO_4}=0,025\left(mol\right)\)

\(\Rightarrow m_{Zn}=0,025.65=1,625\left(g\right)\)

Ta có: m _{dd sau pư} = 1,625 + 40 - 0,025.64 = 40,025 (g)

\(\Rightarrow C\%_{ZnSO_4}=\dfrac{0,025.161}{40,025}.100\%\approx10,056\%\)

PTHH : \(Zn+CuSO_4\rightarrow ZnSO_4+Cu_{\downarrow}\)

Gọi \(n_{Al,pư}=a\left(a>0\right)\)

\(Al+3AgNO_3\rightarrow Al\left(NO_3\right)_3+3Ag\\ \Rightarrow m_{\uparrow}=108.3a-27a=28,5-27\\ \Rightarrow a=\dfrac{1}{198}mol\\ n_{Ag}=\dfrac{1}{198}\cdot3=\dfrac{1}{66}mol\\ m_{Ag}=\dfrac{1}{66}\cdot108=\dfrac{18}{11}=1,64g\)

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

            2x          3x                  x              3x              (mol)

Ta có: \(m_{ddsaup/ứ}=m_{Al}+m_{ddH_2SO_4}-m_{H_2}=54x+200-6x\left(g\right)\)

Dung dịch muối có nồng độ 10%

\(\Rightarrow\dfrac{342x}{54x+200-6x}=0,1\) \(\Rightarrow x=\dfrac{50}{843}\left(mol\right)\)

\(\Rightarrow C\%_{H_2SO_4}=a\%=\dfrac{\dfrac{50}{243}\cdot98}{200}\cdot100\%\approx10,08\%\)

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

Ta có: \(n_{H_2SO_4}=0,2\cdot1,5=0,3\left(mol\right)\)

\(\Rightarrow\left\{{}\begin{matrix}n_{Al}=0,2\left(mol\right)\\n_{Al_2\left(SO_4\right)_3}=0,1\left(mol\right)\\n_{H_2}=0,3\left(mol\right)\end{matrix}\right.\) \(\Rightarrow\left\{{}\begin{matrix}m_{Al}=0,2\cdot27=5,4\left(g\right)\\V_{H_2}=0,3\cdot22,4=6,72\left(l\right)\\C_{M_{Al_2\left(SO_4\right)_3}}=\dfrac{0,1}{0,2}=0,5\left(M\right)\end{matrix}\right.\)