2SO2 + O2 = 2SO3
SO3 + H2O = H2SO4
CuO + H2SO4 = CuSO4 + H2O
CuSO4 + BaCl2 = BaSO4↓ + CuCl2
CuSO4 + 2NaOH = Cu(OH)2↓ + Na2SO4
Cu(OH)2 = CuO + H2O
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Verified answer
2SO2 + O2 = 2SO3
SO3 + H2O = H2SO4
CuO + H2SO4 = CuSO4 + H2O
CuSO4 + BaCl2 = BaSO4↓ + CuCl2
CuSO4 + 2NaOH = Cu(OH)2↓ + Na2SO4
Cu(OH)2 = CuO + H2O