n CuO = n PbO = a(mol)
PTHH: CuO + CO -to-> Cu + CO2
(mol)___a________________a_____a___
PTHH: PbO + CO -to-> Pb + CO2
(mol)__a_________________a_____a_
PTHH: CO2 + Ca(OH)2 -> CaCO3 + H2O
(mol)___2a__________________2a________
Ta có: n CaCO3 = 10/100 = 0,1 = 2a(mol)
=> a =0,05(mol)
m Cu = 0,05.64=3,2(g)
m Pb = 0,05.207=10,35(g)