题目:
在给定条件下的水溶液中可以大量共存的离子组是 [ ]
A.含SO42 -的溶液中:Ca2+、NH4+、HCO3-、Cl-
B.c(Fe2+) =0.5 mol·L-1的溶液中:H+、Na+、NO3-、SO42 -
C.pH =13的溶液中:Na+、K+、Cl-、NO3-
D.由水电离出的c(H+) =10-12 mol·L-1的溶液中:K+、Ba2+、ClO3-、CO32-
答案:
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