\(n_{Fe}=\dfrac{11,2}{56}=0,2\left(mol\right)\)
\(PTHH:Fe+2HCl\rightarrow FeCl_2+H_2\)
(mol)____0,2____0,4____0,2____0,2__
\(a.m_{FeCl_2}=0,2.127=25,4\left(g\right)\)
\(b.C\%_{ddFeCl_2}=\dfrac{m_{ct}}{m_{ddspu}}.100=\dfrac{25,4}{11,2+120-0,2.2}.100=19,4\left(\%\right)\)
\(c.C\%_{ddHCl}=\dfrac{36,5.0,4}{120}.100=12,17\left(\%\right)\)