nSO2= 4.48/22.4=0.2 mol

Cu + 2H2SO4(đ) -to-> CuSO4 + SO2 + H2O

0.2_____________________0.2

mCu= 0.2*64=12.8g

mCuO= 20.8-12.8=8g

nCuO= 8/80=0.1 mol

%Cu= 12.8/20.8*100%= 61.53%

%CuO= 38.47%

Cu +2H2SO4(đ) -to-> CuSO4 + SO2 + H2O

0.2____0.4_______0.2

CuO + H2SO4(đ) -to-> CuSO4 + H2O

0.1____0.1_______0.1

nH2SO4= 0.4+0.1=0.5 mol

mH2SO4= 0.5*98=49g

mdd H2SO4= 49*100/80=61.25%

nCuSO4= 0.2+0.1=0.3 mol

mCuSO4= 0.3*160=48g