皮皮学，免费搜题
登录
搜题
【简答题】
在pH=5.0时，以二甲酚橙(XO)为指示剂，以0.020mol·L -1 EDTA滴定浓度均为0.020mol·L -1 的Zn 2+ 和Cd 2+ 混合溶液中的Zn 2+ ，加入过量KI，使终点时，[I - ]=1mol·L -1 。问：①能否用XO作指示剂滴定Zn 2+ ?Cd 2+ 是否产生干扰?②终点误差为多少?(lgK CaY =16.46；pH=5.0时，pZn ep(XO) =4.8，lgα Y(H) =6.45；Cd 2+ 与I - 络合物的lgβ 1 ～lgβ 4 分别为2.10、3.43、4.49、5.41；lgK ZnY =16.5)
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
.
..
皮皮学刷刷变学霸
举一反三
【简答题】First greet and 1 . Hand out the business card. Keep its 2 up so that it can be read easily. Look at the card and make a 3 before putting back into the case or pocket. Make sure to keep the card 4 . O...
查看完整题目与答案
【单选题】With a lot of problems _______, the principal decided to hold a meeting to have a discussion about them
A.
to solve
B.
being solved
C.
solving
D.
solved
查看完整题目与答案
【判断题】歇山顶是由一条正脊、四条垂脊利四条戗脊组成,故又称为九脊顶。( )
A.
正确
B.
错误
查看完整题目与答案
【单选题】An example of a product which might well have been advertised during the early stages of the Industrial Revolution is
A.
a cooking utensil.
B.
new child's toy.
C.
tinned fruit.
D.
household soap.
查看完整题目与答案
【单选题】They only have a limited amount of time to get their points across.
A.
large
B.
total
C.
small
D.
similar
查看完整题目与答案
【单选题】He was busy writing the essay all the morning, only ______ occasionally to have a cup of tea.
A.
breaking off
B.
breaking out
C.
breaking
D.
breaking away
查看完整题目与答案
【判断题】主动性通常的行为表现是：坚持，面对障碍与困难时不放弃;认识并把握机会;超出工作要求的绩效表现;对一项尚未发生的特殊机会或问题进行事先准备。()
A.
正确
B.
错误
查看完整题目与答案
【判断题】综合布线系统 、楼宇自动化系统、办公自动化系统和通信自动化系统5个部分组成。
A.
正确
B.
错误
查看完整题目与答案
【判断题】麦克卢汉首次提出“地球村”的概念。
A.
正确
B.
错误
查看完整题目与答案
【单选题】Growing number of Americans seek to adopt foreign-born children after women have a right to end unwanted pregnancies in 1973.
A.
Y
B.
N
C.
NG
查看完整题目与答案
相关题目：
【简答题】First greet and 1 . Hand out the business card. Keep its 2 up so that it can be read easily. Look at the card and make a 3 before putting back into the case or pocket. Make sure to keep the card 4 . O...
查看完整题目与答案
【单选题】With a lot of problems _______, the principal decided to hold a meeting to have a discussion about them
A.
to solve
B.
being solved
C.
solving
D.
solved
查看完整题目与答案
【判断题】歇山顶是由一条正脊、四条垂脊利四条戗脊组成,故又称为九脊顶。( )
A.
正确
B.
错误
查看完整题目与答案
【单选题】An example of a product which might well have been advertised during the early stages of the Industrial Revolution is
A.
a cooking utensil.
B.
new child's toy.
C.
tinned fruit.
D.
household soap.
查看完整题目与答案
【单选题】They only have a limited amount of time to get their points across.
A.
large
B.
total
C.
small
D.
similar
查看完整题目与答案
【单选题】He was busy writing the essay all the morning, only ______ occasionally to have a cup of tea.
A.
breaking off
B.
breaking out
C.
breaking
D.
breaking away
查看完整题目与答案
【判断题】主动性通常的行为表现是：坚持，面对障碍与困难时不放弃;认识并把握机会;超出工作要求的绩效表现;对一项尚未发生的特殊机会或问题进行事先准备。()
A.
正确
B.
错误
查看完整题目与答案
【判断题】综合布线系统 、楼宇自动化系统、办公自动化系统和通信自动化系统5个部分组成。
A.
正确
B.
错误
查看完整题目与答案
【判断题】麦克卢汉首次提出“地球村”的概念。
A.
正确
B.
错误
查看完整题目与答案
【单选题】Growing number of Americans seek to adopt foreign-born children after women have a right to end unwanted pregnancies in 1973.
A.
Y
B.
N
C.
NG
查看完整题目与答案