\(m_{Fe}=\frac{5,6}{56}=0,1\left(mol\right)\); \(m_S=\frac{1,6}{32}=0,05\left(mol\right)\)
PTHH: Fe + S --> FeS
0,1 0,05
Xét tỉ lệ: \(\frac{0,1}{1}>\frac{0,05}{1}\) => Fe dư, S hết
PTHH: Fe + S --> FeS
0,05 - 0,05 - 0,05 (mol)
\(=>\left\{{}\begin{matrix}n_{FeS}=0,05\left(mol\right)\\n_{Fe\left(dư\right)}=0,1-0,05=0,05\left(mol\right)\end{matrix}\right.\)
PTHH: FeS + 2HCl --> FeCl2 + H2S
0,05 -> 0,1 (mol)
Fe +2HCl --> FeCl2 + H2
0,05 -> 0,1 (mol)
=> \(n_{HCl}=0,1+0,1=0,2\left(mol\right)\)
=> \(V_{HCl}=0,2.1=0,2\left(l\right)\)
MIK NGHĨ ZẬY !!!