皮皮学，免费搜题
登录
搜题
【单选题】
25℃时，下列各溶液中有关物质的量浓度关系正确的是A.
pH=2的醋酸溶液与pH=12的NaOH溶液等体积混合： c (Na ＋ )+ c (H ＋ )= c (OH － ) +c (CH 3 COO － )
B.
Na 2 CO 3 溶液中：2 c (Na ＋ ) ＝ c (CO 3 2 － )＋ c (HCO 3 － ) ＋ c (H 2 CO 3 )
C.
NH 4 HSO 4 溶液中滴加NaOH至溶液恰好呈中性： c (Na ＋ )＞ c (SO 4 2 － ) ＞ c (NH 4 ＋ ) ＞ c (OH － ) ＝ c (H ＋ )
D.
pH相同的CH 3 COONa溶液、C 6 H 5 ONa溶液、Na 2 CO 3 溶液、NaOH溶液： c (CH 3 COONa)＞ c (Na 2 CO 3 ) ＞ c (C 6 H 5 ONa ) ＞ c (NaOH )
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
【简答题】If you listened more carefully, ____________. 2. If you listen carefully, ____________. 3. If you arrived early, ____________. 4. If you arrive early, ____________. 5. If you give us a unit price of €...
【单选题】If a computer crashes，you will lose the file you _____ on if you don’t save it early enough.
A.
are working
B.
work
C.
will work
D.
worked
【单选题】—Do you have a minute? I've got something to tell you. —OK, you make it short. [ ]
A.
now that
B.
if only
C.
so long as
D.
every time
【单选题】－Do you have a minute? I’ve got something to tell you. －Ok, ______ you make it short.
A.
now that
B.
if only
C.
so long as
D.
every time
相关题目：
参考解析：
知识点：
题目纠错 0
发布
