(1)S 2->Cl ->Na +>Mg 2+
(2)H 2O的沸点高于H 2S,原因是液态水分子间存在氢键
(3)H 2(g)+1/2O 2(g)==H 2O(g) △H= -2QkJ/mol(或2H 2(g)+O 2(g)==2H 2O(g) △H=-4QkJ/mol)
(4)C 2H 4
(5)酸;Al 3++3H 2O
Al(OH) 3+3H +
(6)3Na 2O 2+6Fe 2++6H 2O==6Na ++4Fe(OH) 3↓+2Fe 3+
(1)S 2->Cl ->Na +>Mg 2+
(2)H 2O的沸点高于H 2S,原因是液态水分子间存在氢键
(3)H 2(g)+1/2O 2(g)==H 2O(g) △H= -2QkJ/mol(或2H 2(g)+O 2(g)==2H 2O(g) △H=-4QkJ/mol)
(4)C 2H 4
(5)酸;Al 3++3H 2O
Al(OH) 3+3H +
(6)3Na 2O 2+6Fe 2++6H 2O==6Na ++4Fe(OH) 3↓+2Fe 3+