首页/ 题库 / [单选题]为测定Pb2+, 先将其沉淀为PbCrO的答案

为测定Pb2+, 先将其沉淀为PbCrO4, 然后用酸溶解, 加入KI, 再以Na2S2O3滴定, 此时n(Pb2+) : n(S2O32-) 是 ( )

单选题
2021-09-01 23:42
A、1:1
B、1:2
C、1:3
D、1:6
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正确答案
C

试题解析

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