Cu->CuSO4->Cu(OH)2->(CuOH)2SO4->CuSO4

Question

Cu->CuSO4->Cu(OH)2->(CuOH)2SO4->CuSO4

Answer 1

Cu+O2=CuO
CuO+H2SO4=CuSO4+H2O
CuSO4+2NaOH=Cu(OH)2+Na2SO4 Cu(OH)2- осадок