CuO+H2\(\overset{t^0}{\rightarrow}\)CuO+H2O
FexOy+yH2\(\overset{t^0}{\rightarrow}\)xFe+yH2O
Fe+H2SO4\(\rightarrow\)FeSO4+H2
\(n_{Fe}=n_{H_2}=\dfrac{3,36}{22,4}=0,15mol\)\(\rightarrow\)\(m_{Fe}=0,15.56=8,4gam\)
\(m_{Cu}=12,8gam\rightarrow n_{Cu}=\dfrac{12,8}{64}=0,2mol\)
\(n_{CuO}=n_{Cu}=0,2mol\rightarrow m_{CuO}=0,2.80=16gam\)
\(m_{Fe_xO_y}=28-16=12gam\)\(\rightarrow m_{O\left(oxit\right)}=12-8,4=3,6gam\)
\(n_O=\dfrac{3,6}{16}=0,225mol\)
\(\dfrac{x}{y}=\dfrac{n_{Fe}}{n_O}=\dfrac{0,15}{0,225}=\dfrac{2}{3}\)
Fe2O3
%CuO=\(\dfrac{16.100}{28}\approx57,14\%\)
%Fe2O3=100%-57,14%=42,86%