有一包白色固体,可能含有Na2SO4、Na2CO3、BaCl2、KNO3中的一种或几种。

有一包白色固体,可能含有Na2SO4、Na2CO3、BaCl2、KNO3中的一种或几种。取样溶于水,有白色沉淀产生;过滤后向沉淀中滴加稀盐酸,沉淀的量与加入盐酸体积的关系如下图所示。由此推断白色固体中
A.可能存在KNO3B.可能存在Na2SO4
C.肯定只存在Na2CO3D.肯定不存在BaCl2

答案

A解析:
有图像可知,肯定存在Na2SO4、Na2CO3、BaCl2

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