皮皮学，免费搜题
登录
搜题
【单选题】
某温度下HF的电离常数Ka=3.3×10 -4 mol·L -1 ，CaF 2 的溶度积常数Ksp=1.46×10 -10 （mol·L -1 ） 3 。在该温度下取浓度为0.31 mol·L -1 的HF与浓度为0.002 mol·L -1 的CaCl 2 溶液等体积混合。下列说法正确的是（  ）
A.
该温度下，0.31 mol·L -1 的HF溶液的pH=2
B.
升高温度或增大浓度，HF的电离平衡常数都将增大
C.
两溶液混合不会产生沉淀
D.
向饱和的CaF 2 溶液中加水后，c(Ca 2+ )一定比加水前减小
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
【单选题】下列选择中,关于Canvas类说法错误的是( )。
A.
Canvas代表画布 。
B.
Canvas可以绘制各种各样的图形，如矩形。
C.
Canvas和Paint作用一样。
D.
Canvas有一个方法drawRect(Rect r ,Paint paint)，表示画出一个指定矩形。
查看完整题目与答案
【单选题】According to ILO Convention, hours of rest may be divided into no more than periods on board the ship.
A.
two
B.
three
C.
five
D.
four
查看完整题目与答案
【单选题】【单选】Hours of rest may be divided into no more than two periods, one of which shall be at least _____in length.
A.
five hours
B.
seven hours
C.
six hours
D.
four hours
查看完整题目与答案
【单选题】In maritime Labor convention, hours of rest may be divide into no more than periods,one of which shall be at least six hour in length, and the interval between consecutive period of rest shall not exc...
A.
12
B.
10
C.
18
D.
14
查看完整题目与答案
【判断题】教育学是研究教育现象、教育问题,揭示教育规律的科学。
A.
正确
B.
错误
查看完整题目与答案
【单选题】According to ILO Convention，hours of rest may be divided into no more than ______ periods on board the ship．
A.
two
B.
three
C.
four
D.
five
查看完整题目与答案
【单选题】Hours of rest may be divided into no more than two periods, one of which shall be at least _____ hours in length, and the interval between consecutive periods of rest shall not exceed _____ hours.
A.
4/12
B.
6/12
C.
4/14
D.
6/14
查看完整题目与答案
【单选题】According to Maritime Labour Convention 2006,hours of rest may be divides into no more than_____.
A.
one perod
B.
two periods
C.
three periods
D.
four periods
查看完整题目与答案
【单选题】In maritime labour convention, hours of rest may be divided into no more than periods, one of which shall be at least six hour in length, and the interval between consecutive periods of rest shall not...
A.
14
B.
10
C.
12
D.
18
查看完整题目与答案
【单选题】Hours of rest may be divided into no more than two periods, one of which shall be at least in length.
A.
four hours
B.
five hours
C.
six hours
D.
seven hours
查看完整题目与答案
相关题目：
【单选题】下列选择中,关于Canvas类说法错误的是( )。
A.
Canvas代表画布 。
B.
Canvas可以绘制各种各样的图形，如矩形。
C.
Canvas和Paint作用一样。
D.
Canvas有一个方法drawRect(Rect r ,Paint paint)，表示画出一个指定矩形。
查看完整题目与答案
【单选题】According to ILO Convention, hours of rest may be divided into no more than periods on board the ship.
A.
two
B.
three
C.
five
D.
four
查看完整题目与答案
【单选题】【单选】Hours of rest may be divided into no more than two periods, one of which shall be at least _____in length.
A.
five hours
B.
seven hours
C.
six hours
D.
four hours
查看完整题目与答案
【单选题】In maritime Labor convention, hours of rest may be divide into no more than periods,one of which shall be at least six hour in length, and the interval between consecutive period of rest shall not exc...
A.
12
B.
10
C.
18
D.
14
查看完整题目与答案
【判断题】教育学是研究教育现象、教育问题,揭示教育规律的科学。
A.
正确
B.
错误
查看完整题目与答案
【单选题】According to ILO Convention，hours of rest may be divided into no more than ______ periods on board the ship．
A.
two
B.
three
C.
four
D.
five
查看完整题目与答案
【单选题】Hours of rest may be divided into no more than two periods, one of which shall be at least _____ hours in length, and the interval between consecutive periods of rest shall not exceed _____ hours.
A.
4/12
B.
6/12
C.
4/14
D.
6/14
查看完整题目与答案
【单选题】According to Maritime Labour Convention 2006,hours of rest may be divides into no more than_____.
A.
one perod
B.
two periods
C.
three periods
D.
four periods
查看完整题目与答案
【单选题】In maritime labour convention, hours of rest may be divided into no more than periods, one of which shall be at least six hour in length, and the interval between consecutive periods of rest shall not...
A.
14
B.
10
C.
12
D.
18
查看完整题目与答案
【单选题】Hours of rest may be divided into no more than two periods, one of which shall be at least in length.
A.
four hours
B.
five hours
C.
six hours
D.
seven hours
查看完整题目与答案