a) Fe + 2HCl --> FeCl2 + H2
b) \(n_{Fe}=\dfrac{8,4}{56}=0,15\left(mol\right)\)
PTHH: Fe + 2HCl --> FeCl2 + H2
0,15-->0,3---->0,15-->0,15
=> VH2 = 0,15.22,4 = 3,36 (l)
c) \(m_{dd.HCl}=\dfrac{0,3.36,5}{7,3\%}=150\left(g\right)\)
\(n_{Fe}=\dfrac{8,4}{56}=0,15\left(mol\right)\\
pthh:Fe+2HCl\rightarrow FeCl_2+H_2\)
0,15 0,3 0,15
\(V_{H_2}=0,15.22,4=3,36l\\
m_{\text{dd}HCl}=\dfrac{100.\left(0,3.36,5\right)}{7,3}=150g\)