题目内容

在用EDTA滴定Zn2+时,由于加入了氨缓冲溶液,使NH3与Zn2+发生作用,从而引起Zn2+与EDTA反应的能力降低,我们称此为( )。

A. 酸效应
B. 配位效应
C. 水解效应
D. 干扰效应

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酸效应曲线中,金属离子位置所对应的pH值就是滴定这种金属离子的 。

whatarethe three main types of complaints in lodging industry?()

A. employee behaviour
B. dishonesty
C. property quality, condition and location.
D. price

What does L.E.A.R.N stand for?

A. The letter L stands for listen
B. The letter E stands for empathize.
C. The letter A stands for apologize.
D. The letter R stands for respond

Indealing with thecustomer's complaint,You can utilize the L.E.A.R.N hints to manage withit.

A. 对
B. 错

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