(1)一定温度下,向1L 0.1mol•L
﹣1 CH
3COOH溶液中加入0.1mol CH
3COONa固体,则醋酸的电离平衡向
(填“正”或“逆”)反应方向移动;溶液中
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的值
(填“增大”、“减小”或“不变”).
(2)氨气的水溶液称为氨水,其中存在的主要溶质微粒是NH3•H2O.已知:
a.常温下,醋酸和NH3•H2O的电离平衡常数均为1.74×10﹣5;
b.CH3COOH+NaHCO3═CH3COONa+CO2↑+H2O.
则CH3COONH4溶液呈 性(填“酸”、“碱”或“中”,下同),NH4HCO3溶液呈 性,NH4HCO3溶液中物质的量浓度最大的离子是 (填化学式).
(3)99℃时,Kw=1.0×10﹣12 , 该温度下测得0.1mol•L﹣1 Na2A溶液的pH=6.
①H2A在水溶液中的电离方程式为 .
②该温度下,将0.01mol•L﹣1 H2A溶液稀释到20倍后,溶液的pH= .
③体积相等、pH=1的盐酸与H2A溶液分别与足量的Zn反应,产生的氢气 .
A.盐酸多 B.H2A多
C.一样多 D.无法确定
④将0.1mol•L﹣1 H2A溶液与0.2mol•L﹣1氨水等体积混合,完全反应后溶液中各离子浓度从大到小的顺序为 .