Ответ: Al2(SO4)3 + 2H2O = 2(AlOH)SO4 + H2SO42Al3+ + 3SO42– + 2H2O = 2(AlOH)2+ + 2H+ + 3SO42–2Al3+ + 2H2O = 2(AlOH)2+ + 2H+Al3+ + H2O = (AlOH)2+ + 2H+рН раствора < 7