Fe(NO3)3 + 3NaOH -> Fe(OH)3↓+ 3NaNO3
Fe(+3) + 3NO3(-) + 3Na(+) + 3OH(-) -> Fe(OH)3 ↓ + 3Na(+) + 3NO3(-)
Fe(+3) + 3OH(-) -> Fe(OH)3↓
2Fe(OH)3 + 3H2SO4 -> Fe2(SO4)3 + 6H2O
2Fe(OH)3 + 6H(+) + 3SO4(-2) -> 2Fe(+3) + 3SO4(-2) + 6H2O
2Fe(OH)3 + 6H(+) -> 2Fe(+3) + 6H2O