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【单选题】
能大量共存于同一溶液中，且当加入另一种强电解质使水电离出的c（H + ）=1×10 -13 mol/L一定能发生反应的离子组是（ ） ①Na + 、Ba 2+ 、Cl - 、HCO 3 - ②K + 、NH 4 + 、CH 3 COO - 、SO 4 2- ③Ca 2+ 、Cu 2+ 、NO 3 - 、SO 3 2- ④Fe 3+ 、Na + 、SCN - 、Cl - ⑤Al 3+ 、Na + 、HCO 3 - 、NO 3 - ⑥Fe 2+ 、Na + 、NO 3 - 、I - ⑦Ag + 、NH 4 + 、OH - 、NO 3 - ⑧Na + 、K + 、CH 3 COO - 、NO 3 - ．A.
①②⑥
B.
②③⑥
C.
①④⑧
D.
③⑤⑦
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