中和滴定实验中,标准NaOH溶液的浓度,通常用H 2 C 2 O 4 ·H 2 O为基准物质进行标定。基准物质必须具备的条件: ①物质纯度要高, ②相对分子质量较大, ③性质稳定,如不易分解、不风化、不潮解、不跟空气中的CO 2 、O 2 等反应。 实验室标定盐酸的浓度时,选择的基准物质最好是 [ ]
A.
NaOH
B.
NaHCO 3
C.
Na 2 CO 3
D.
Na 2 CO 3 ·10H 2 O
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