СuSO4+2NaOH=Cu(OH)2+Na2SO4
Cu2++SO42-+2Na++2OH-=Cu(OH)2+2Na++SO42-
Cu2++2OH-=Cu(OH)2
Ca(OH)2+Na2CO3=CaCO3+2NaOH
Ca2++2OH-+2Na+CO3=CaCO3+2Na++2OH-
Ca2++CO3=CaCO3
СuSO4+2NaOH=Cu(OH)2+Na2SO4
Cu2++SO42-+2Na++2OH-=Cu(OH)2+2Na++SO42-
Cu2++2OH-=Cu(OH)2
Ca(OH)2+Na2CO3=CaCO3+2NaOH
Ca2++2OH-+2Na+CO3=CaCO3+2Na++2OH-
Ca2++CO3=CaCO3