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【单选题】
称取W(g)基准NaCl,溶解后移入250 mL容量瓶中,稀释至刻度配成标准溶液,用移液管吸取其分量来标定AgNO3溶液的浓度,在下述( )情况将使所标AgNO3的溶液的浓度偏低。A.
滴定管在所用容积区间的校正值为负值
B.
所用砝码的总校正值的负值
C.
移液管的校正值为正值
D.
容量瓶的校正值的正值
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举一反三
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