用K2Cr2O7基准物质配制0.01667mol·L-1溶液一升,下列操作中合适的是() -题库考试答案搜索网

用K2Cr2O7基准物质配制0.01667mol·L-1溶液一升,下列操作中合适的是()

单选题

2021-09-01 23:42

A、在分析天平上用差减法准确称取K2Cr2O7 4.903克;
B、以直接称量法用称量纸在分析天平上称取4.903克;
C、用600 ml烧杯以直接称量法在台天平上称得4.9克;
D、以直接称量法用称量纸在台天平上称取4.9克

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正确答案

B

试题解析

标签：青书学堂大连工业大学界面与胶体化学

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