Fe(OH)₃ + 3HNO₃ => Fe(NO₃)₃ + 3H₂O
Fe(OH)₃ + H₂SO₄ => FeOHSO₄ + 2H₂O
Ca(OH)₂ + 2H₂S => Ca(HS)₂ + 2H₂O
Fe(OH)₃ + 3HNO₃ => Fe(NO₃)₃ + 3H₂O
Fe(OH)₃ + H₂SO₄ => FeOHSO₄ + 2H₂O
Ca(OH)₂ + 2H₂S => Ca(HS)₂ + 2H₂O