Fe+2HCl->Fecl2+H2
1--------0,2-----0,1----0,1
n Fe=\(\dfrac{5,6}{56}\)=0,1 mol
n HCl=\(\dfrac{36,5}{36,5}\)=1 mol
=>HCl dư :0,8mol
=>m HCl=0,8.36,5=29,2g
=>m FeCl2=0,1.127=12,7g
=>VH2=0,1.22,4=2,24l
a) \(n_{Fe}=\dfrac{5,6}{56}=0,1\left(mol\right)\); \(n_{HCl}=\dfrac{36,5}{36,5}=1\left(mol\right)\)
PTHH: Fe + 2HCl --> FeCl2 + H2
Xét tỉ lệ: \(\dfrac{0,1}{1}< \dfrac{1}{2}\) => Fe hết, HCl dư
PTHH: Fe + 2HCl --> FeCl2 + H2
0,1->0,2----->0,1--->0,1
=> \(m_{HCl\left(dư\right)}=\left(1-0,2\right).36,5=29,2\left(g\right)\)
b) \(m_{FeCl_2}=0,1.127=12,7\left(g\right)\)
c) \(V_{H_2}=0,1.22,4=2,24\left(l\right)\)