a) PTHH: \(2Al+6HCl\rightarrow2AlCl_3+3H_2\uparrow\)
b) Ta có: \(n_{Al}=\dfrac{5,4}{27}=0,2\left(mol\right)\) \(\Rightarrow n_{HCl}=0,3\left(mol\right)\)
\(\Rightarrow C\%_{HCl}=\dfrac{0,3\cdot36,5}{100}\cdot100\%=10,95\%\)
c+d) Theo PTHH: \(\left\{{}\begin{matrix}n_{H_2}=0,3\left(mol\right)\\n_{AlCl_3}=0,2\left(mol\right)\end{matrix}\right.\) \(\Rightarrow\left\{{}\begin{matrix}V_{H_2}=0,3\cdot22,4=6,72\left(l\right)\\m_{H_2}=0,3\cdot2=0,6\left(g\right)\\m_{AlCl_3}=0,2\cdot133,5=26,7\left(g\right)\end{matrix}\right.\)
Mặt khác: \(m_{dd}=m_{Al}+m_{ddHCl}-m_{H_2}=104,8\left(g\right)\)
\(\Rightarrow C\%_{AlCl_3}=\dfrac{26,7}{104,8}\cdot100\%\approx25,48\%\)
