\(PTHH:Fe+Cl_2\underrightarrow{^{t^o}}FeCl_2\)
\(n_{Fe}=\frac{14}{56}=0,25\left(mol\right)\)
\(n_{Cl2}=\frac{12,6}{22,4}==0,5625\left(mol\right)\)
Lập tỉ lệ :
\(\frac{0,25}{2}< \frac{0,5625}{3}\Rightarrow\) Cl2 dư , tính theo Fe.
\(n_{FeCl2}=n_{Fe}=0,25\left(mol\right)\)
\(m_{FeCl2}=0,25.127=31,75\left(g\right)\)
Mà \(H=90\%\)
\(\Rightarrow m_{FeCl2}=31,75.\frac{90}{100}=28,575\left(g\right)\)