某溶液中滴入BaCl2溶液,产生白色沉淀,再滴入稀盐酸,沉淀不溶解

某溶液中滴入BaCl2溶液,产生白色沉淀,再滴入稀盐酸,沉淀不溶解,则该溶液中

A. 一定有SO42-     B. 可能有SO42- Ag+   

C. 一定无Ag+      D. 还可能有CO32-

答案

B

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