PT: \(FeO+2HCl\rightarrow FeCl_2+H_2O\)
\(Al_2O_3+6HCl\rightarrow2AlCl_3+3H_2O\)
Ta có: 72nFeO + 102nAl2O3 = 45 (1)
\(n_{HCl}=1.2,2=2,2\left(mol\right)\)
Theo PT: \(n_{HCl}=2n_{FeO}+6n_{Al_2O_3}=2,2\left(2\right)\)
Từ (1) và (2) \(\Rightarrow\left\{{}\begin{matrix}n_{FeO}=0,2\left(mol\right)\\n_{Al_2O_3}=0,3\left(mol\right)\end{matrix}\right.\)
\(\Rightarrow\left\{{}\begin{matrix}n_{FeO}=0,2.72=14,4\left(g\right)\\m_{Al_2O_3}=0,3.102=30,6\left(g\right)\end{matrix}\right.\)
Theo PT: \(\left\{{}\begin{matrix}n_{FeCl_2}=n_{FeO}=0,2\left(mol\right)\\n_{AlCl_3}=2n_{Al_2O_3}=0,6\left(mol\right)\end{matrix}\right.\)
⇒ m muối = mFeCl2 + mAlCl3 = 0,2.127 + 0,6.133,5 = 105,5 (g)
\(n_{HCl}=1.2,2=2,2mol\\ FeO+2HCl\rightarrow FeCl_2+H_2O\\ Al_2O_3+6HCl\rightarrow2AlCl_3+3H_2O\\ n_{FeO}=a;n_{Al_2O_3}=b\\ \Rightarrow\left\{{}\begin{matrix}72a+102b=45\\2a+6b=2,2\end{matrix}\right.\\ \Rightarrow a=0,2;b=0,3\\ m_{FeO}=0,2.72=14,4g\\ m_{Al_2O_3}=45-14,4=30,6g\\ n_{FeO}=n_{FeCl_2}=0,2mol\\ n_{Al_2O_3}=0,3.2=0,6mol\\ m_{muối}=0,2.127+0,6.133,5=105,5g\)
