2Al + 6HCl → 2AlCl3 + 3H2
a) Theo PT: \(n_{H_2}lt=\dfrac{3}{2}n_{Al}=\dfrac{3}{2}\times0,1=0,15\left(mol\right)\)
Do \(H\%=80\%\Rightarrow n_{H_2}tt=0,15\times80\%=0,12\left(mol\right)\)
\(\Rightarrow V_{H_2}tt=0,12\times22,4=2,688\left(l\right)\)
b) Theo PT: \(n_{HCl}=3n_{Al}=3\times0,1=0,3\left(mol\right)\)
Do \(H\%=90\%\Rightarrow n_{HCl}pư=0,3\times90\%=0,27\left(mol\right)\)
\(\Rightarrow m_{HCl}=0,27\times36,5=9,855\left(g\right)\)