现有碳酸钠、氢氧化钡、硫酸三种体积和物质的量浓度都相同的溶液

现有碳酸钠、氢氧化钡、硫酸三种体积和物质的量浓度都相同的溶液,以不同的顺序将它们三者混合,混合中如生成沉淀,立即过滤掉。关于所得溶液的酸碱性的下列结论中不正确的是(    )

A.一定显碱性             B.可能显中性               C.不可能显酸性              D.可能显碱性

答案

A

【解析】若酸碱先中和,再加碳酸钠溶液呈碱性,若碳酸钠和氢氧化钡先混合过滤再加酸呈中性,若碳酸钠先与硫酸反应后再加碱呈碱性。所以应该是碱性和中性有可能,不可能显酸性,A错误。

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