\(n_{H2}=\dfrac{2,24}{22,4}=0,1\left(mol\right)\)
PTHH: \(2Al+6HCl\rightarrow2AlCl_3+3H_2\)
. Theo PT và đề bài ta có tỉ lệ:
\(\dfrac{0,4}{6}=\dfrac{1}{15}>\dfrac{0,1}{3}=\dfrac{1}{30}\)
=> HCl dư. H2 hết nên tính theo \(n_{H2}\)
a. Theo PT ta có: \(n_{Al}=\dfrac{2}{3}.n_{H2}=\dfrac{2}{3}.0,1=\dfrac{1}{15}\left(mol\right)\)
\(\Rightarrow m_{Al}=\dfrac{1}{15}.27=1,8\left(g\right)\)
b. Theo PT ta có: \(n_{AlCl3}=\dfrac{2}{3}.0,1=\dfrac{1}{15}\left(mol\right)\)
\(\Rightarrow m_{AlCl3}=\dfrac{1}{15}.133,5=8,9\left(g\right)\)
c. Ta có: \(n_{HCl\left(pư\right)}=\dfrac{6}{3}.n_{H2}=\dfrac{6}{3}.0,1=0,2\left(mol\right)\)
\(\Rightarrow n_{HCl\left(dư\right)}=0,4-0,2=0,2\left(mol\right)\)
\(\Rightarrow m_{HCl\left(dư\right)}=0,2.36,5=7,3\left(g\right)\)