Fe+2HCl\(\rightarrow\)FeCl2+H2
\(n_{Fe}=\dfrac{14}{56}=0,25mol\)
\(n_{H_2}=n_{Fe}=0,25mol\)
\(n_{FeCl_2}=n_{Fe}=0,25mol\)
\(m_{FeCl_2}=0,25.127=31,75gam\)
H2+CuO\(\overset{t^0}{\rightarrow}\)Cu+H2O
\(n_{CuO}=\dfrac{25,6}{80}=0,32mol\)
Tỉ lệ: \(\dfrac{0,25}{1}< \dfrac{0,32}{1}\)\(\rightarrow\)CuO dư
\(n_{Cu}=n_{CuO}=n_{H_2}=0,25mol\)
\(m_{Cu}=0,25.64=16gam\)
\(n_{CuO\left(dư\right)}=0,32-0,25=0,07mol\)
\(m_{CuO}=0,07.80=5,6gam\)