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
查看答案
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