皮皮学，免费搜题
登录
搜题
【单选题】
在实验室中草酸钠（Na 2 C 2 O 4 ）为标准液，通过氧化还原滴定来测定高锰酸钾溶液的浓度，其反应的化学方程式为： C 2 O 4 2— +MnO 4 — +H + —→Mn 2+ +CO 2 ↑+H 2 O。下列有关草酸钠滴定高锰酸钾实验的叙述，正确的是 （ ）A.
滴定过程中，高锰酸钾被氧化，草酸钠被还原
B.
用酸式滴定管量取草酸钠溶液
C.
该反应中，消耗的草酸钠与高锰酸钾的物质的量之比为5:2
D.
为便于滴定终点的判断，滴定时必须往体系中加入指示剂
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】Misty has the option of purchasing one of three products: Brand A, Brand B, or Brand C. Each costs ten dollars. If she decides that Brand A meets her needs best, then the opportunity cost of this deci...
A.
Brand B plus Brand C.
B.
twenty dollars.
C.
Brand
D.
Brand B or Brand C, depending on which is considered the highest-value alternative forgone.
【判断题】One of the reasons for building a distributed system is that some applications are inherently distributed.
A.
正确
B.
错误
【简答题】equ,equi 表示—
【单选题】These are just some of the reasons why I find the film compelling . ( necessary necessity )
A.
mysterious
B.
attractive
【单选题】______is forbidden in some states in the United States for religious reasons, while it is permitted in some other states.
A.
Conception
B.
Abortion
C.
Delivery
D.
Perception
【单选题】The writer opened the wallet because he wanted to______in it.
A.
find some money
B.
find some gold
C.
find the owner's name
D.
find the owner's photograph
相关题目：
参考解析：
知识点：
题目纠错 0
发布
