Ta có: \(n_{Fe}=\dfrac{22,4}{56}=0,4\left(mol\right)\)
PT: \(Fe+2HCl\rightarrow FeCl_2+H_2\)
____0,4_____0,8____0,4_____0,4 (mol)
a, \(m_{HCl}=0,8.36,5=29,2\left(g\right)\)
b, \(m_{FeCl_2}=0,4.127=50,8\left(g\right)\)
c, \(m_{H_2}=0,4.2=0,8\left(g\right)\)
d, \(m_{ddHCl}=\dfrac{29,2}{14,6\%}=200\left(g\right)\)
m dd sau pư = 22,4 + 200 - 0,8 = 221,6 (g)
e, \(C\%_{FeCl_2}=\dfrac{50,8}{221,6}.100\%\approx22,92\%\)