PTHH: \(Fe+2HCl\rightarrow FeCl_2+H_2\uparrow\)
Ta có: \(n_{HCl}=2n_{Fe}=2\cdot\dfrac{5,6}{56}=0,2\left(mol\right)\)
\(\Rightarrow m_{HCl}=0,2\cdot36,5=7,3\left(g\right)\)
a, Fe + 2HCl ---> FeCl2 + H2
0,1 mol ---> 0,05 mol
b, nFe=5,6/56=0,1 mol
mHCl=0,05.36,5=1,825 g