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a. \(n_{Zn}=\dfrac{6.5}{65}=0,1\left(mol\right)\)
PTHH : Zn + 2HCl -> ZnCl2 + H2
0,1 0,2 0,1
b. \(V_{H_2}=0,1.22,4=2,24\left(l\right)\)
c. \(m_{HCl}=0,2.36,5=7,3\left(g\right)\)
\(n_{Zn}=\dfrac{6,5}{65}=0,1mol\)
\(Zn+2HCl\rightarrow ZnCl_2+H_2\)
0,1 0,2 0,1
\(V_{H_2}=0,1\cdot22,4=2,24l\)
\(m_{HCl}=0,2\cdot36,5=7,3g\)
\(a.Zn+2HCl\rightarrow ZnCl_2+H_2\\ b.n_{Zn}=\dfrac{65}{65}=1\left(mol\right)\\ n_{ZnCl_2}=n_{Zn}=1\left(mol\right)\\ \Rightarrow m_{ZnCl_2}=1.136=136\left(g\right)\\ c.n_{H_2}=n_{Zn}=1\left(mol\right)\\ \Rightarrow V_{H_2}=1.22,4=22,4\left(l\right)\)
\(Zn+2HCl\rightarrow ZnCl_2+H_2\)
n H2 = \(\dfrac{6,72}{22,4}=0,3\) (mol)
=> n Zn = n H2 = 0,3 mol
=> m Zn = 0,3.65= 19,5 (g)
\(n_{HCl}=0,2.2=0,4\left(mol\right)\\ a.Zn+2HCl\rightarrow ZnCl_2+H_2\\ b.0,2........0,4.......0,2.......0,2\left(mol\right)\\ m=m_{Zn}=0,2.65=13\left(g\right)\\ c.m_{ZnCl_2}=136.0,2=27,2\left(g\right)\\ d.V_{H_2\left(đktc\right)}=0,2.22,4=4,48\left(l\right)\)
\(a.Mg+2HCl\rightarrow MgCl_2+H_2\\ 2Al+6HCl\rightarrow2AlCl_3+3H_2\\ b.Đặt:\left\{{}\begin{matrix}n_{Mg}=x\left(mol\right)\\n_{Al}=y\left(mol\right)\end{matrix}\right.\\ n_{H_2}=\dfrac{18,48}{22,4}=0,825\left(mol\right)\\ Tacó:\left\{{}\begin{matrix}24x+27y=17,1\\x+\dfrac{3}{2}y=0.825\end{matrix}\right.\\ \Rightarrow\left\{{}\begin{matrix}x=0,375\\y=0,3\end{matrix}\right.\\ \Rightarrow\%m_{Mg}=\dfrac{0,375.24}{17,1}.100=52,63\%\\ \%m_{Al}=47,37\%\)
\(n_{Zn}=\dfrac{26}{65}=0.4\left(mol\right)\)
\(Zn+2HCl\rightarrow ZnCl_2+H_2\)
\(0.4.......0.8....................0.4\)
\(m_{HCl}=0.8\cdot36.5=29.2\left(g\right)\)
\(V_{H_2}=0.4\cdot22.4=8.96\left(l\right)\)