CuSO4+2NaOH=Cu(OH)2+Na2SO4
CuSO4+2NaOH=Na2SO4+Cu(OH)2-(нерастворим!) CuSO4+2HCl=CuCl2+H2SO4 3CuSO4+2AlCl3=3CuCl2+Al2(SO4)3 CuSO4+2NaNO3=Cu(NO3)2+Na2SO4