2)CuSO4+2NaOH = Cu(OH)2+Na2SO4
Cu(2+)+SO4(-2)+2Na(+)+2OH(-)=Cu(OH)2↓+2Na(+)+SO4(-2)
Cu(2+)+2OH(-)=Cu(OH)2↓
2,4)Fe2(SO4)3 + 6NaOH = 2Fe(OH)3(осад.) + 3Na2SO4
2Fe(3+) + 3SO4(-2) + 6Na(+1) + 6OH(-1) = FeOH3 + 6Na(-1) + 3SO4(-2)
Fe(+3) + 3OH(-1) = FeOH3
Cu(2+)+SO4(-2)+2Na(+)+2OH(-)=Cu(OH)2↓+2Na(+)+SO4(-2)
Cu(2+)+2OH(-)=Cu(OH)2↓
2,4)Fe2(SO4)3 + 6NaOH = 2Fe(OH)3(осад.) + 3Na2SO4
2Fe(3+) + 3SO4(-2) + 6Na(+1) + 6OH(-1) = FeOH3 + 6Na(-1) + 3SO4(-2)
Fe(+3) + 3OH(-1) = FeOH3