将硝酸银溶液滴入盐A的溶液中,产生不溶于稀硝酸的白色沉淀.将钠盐B的溶液滴入盐A的溶液中也产生不溶于稀硝酸的白色沉淀.则A和B的化学式分别是A.Na2SO4和BaCl2 B.BaCl2和CaCO3 C.Ba(NO3)2和Na2SO4 D.BaCl2和Na2SO4

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D.BaCl2和Na2SO4

选D
A中含氯离子,B中含硫酸根离子,所以A是氯化钡,B是硫酸钠.

D