题目
A、甲酸
B、乙酸
C、丙酸
第3题
已知25℃水溶液中甲酸(HCOOH)和乙酸(CH3COOH)的标准解离常数分别为1.82×10-4和1.74×10-5,求下列溶液中氢离子的质量摩尔浓度b(H+):
(1)b=1mol·kg-1的甲酸水溶液;(2)b=1mol·kg-1的乙酸水溶液;(3)质量摩尔浓度均为b=1mol·kg-1的甲酸和乙酸混合液。计算结果说明什么?
第4题
A.CH3COOH>CH3CH2OH > CF3COOH> CH3NH2
B.CF3COOH> CH3NH2> CH3COOH>CH3CH2OH
C.CF3COOH> CH3COOH>CH3CH2OH> CH3NH2
D.CH3COOH> CF3COOH> CH3CH2OH> CH3NH2
第6题
A.CH3COOH>CH3CH2OH > CF3COOH> CH3NH2
B.CF3COOH> CH3NH2> CH3COOH>CH3CH2OH
C.CF3COOH> CH3COOH>CH3CH2OH> CH3NH2
D.CH3COOH> CF3COOH> CH3CH2OH> CH3NH2
第8题
A.CH3COOH>CH3CH2OH > CF3COOH> CH3NH2
B.CF3COOH> CH3NH2> CH3COOH>CH3CH2OH
C.CF3COOH> CH3COOH>CH3CH2OH> CH3NH2
D.CH3COOH> CF3COOH> CH3CH2OH> CH3NH2
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