常温下,下列各组离子在指定溶液中一定能大量共存的是 (    ) A.

离子在指共存(    )

A 溶液HFe2+SO42-NO3-  

B 使溶液Ca2NH4CH3COO-Cl-

C 0.1mol··L1 BaCl2 中:K+Na+OHNO3ˉ

D c(H+)=1012mol·L1 的溶液中Mg2KBrHCO3 。

答案

C

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