CuO + H2 -> Cu + H2O
0.01 0.01
FexOy + yH2 -> xFe + yH2O
Fe + 2HCl -> FeCl2 + H2
\(\)0.02 0.02 \(\)
Cu + HCl -> (không phản ứng)
nH2 = 0.02mol => mFe = 1.12g
=> mCu = 1.76 - 1.12 = 0.64g => nCu = 0.01mol
=> mCuO = 0.8g => mFexOy = 2.4 - 0.8 = 1.6g
Ta có: 56x + 16y -> 56x
1.6g -> 1.12g
=> \(1.6\times56x=1.12\times\left(56x+16y\right)\)
=> \(26.88x=17.92y\Leftrightarrow\dfrac{x}{y}=\dfrac{2}{3}\)
=> Fe2O3