题目内容
用汞量法测定青霉素钠的含量,以下叙述中正确的有
2021-10-19
A.首先加氢氧化钠溶液使青霉素钠降解
B.用硝酸汞滴定液滴定
C.用醋酸汞滴定液滴定
D.用铬酸钾指示终点
E.用电位法指示终点
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