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【简答题】
从方框中选择适当单词并用其正确形式填空。 try I take worse soon on off difficulty leave away one easy Last week, my friend, Mike, decided __小题1:__ a trip to Beijing by train. I went to the train station to see him off. He took a lot of luggage(行李)with him. So I got __小题2:__ the train with him and helped him put__小题3:__ his luggage. There were a lot of people on the train. Some of them had no seats and they stood in the aisle(过道). When I __小题4:__to get off the train, one worker shouted, “The train is __小题5:___now. Please get on the train as __小题6:__ as possible.” Then many people tried to get on the train. It was __小题7:__ for me to move. Before I could get off, the train began to move. Then my friend said to me, “Why don’t you go to Beijing with __小题8:__ ? You will have a great time there.” I thought it was not a __小题9:__ idea. So I went to Beijing for the __小题10:__time.
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【简答题】在0.1mol·L -1 [Ag(NH 3 ) 2 ] + 溶液中加入NaCl，使NaCl的浓度达到0.001mol·L -1 时，问(1)有无AgCl沉淀出现?(2)在含有2mol·L -1 氨水的0.1mol·L -1 的[Ag(NH 3 ) 2 ] + 溶液中加入NaCI，也使NaCl的浓度达到0.001mol·L -1 时，问有无AgCl沉淀出现?(3)从两种情况中试得出必要的结论。
【简答题】1 mol·L -1 [Ag (NH 3 ) 2 ] + 和0.1 mol·L -1 [Cu (NH 3 ) 4 ] 2+ 哪个更稳定____。(已知K f θ [Ag (NH 3 ) 2 ] + =1.6×10 7 ;K f θ [Cu (NH 3 ) 4 ] 2+ =4.8×10 12 。)
【简答题】向1.0L0.1mol·L -1 [Ag(NH 3 ) 2 ] + 溶液中加入KBr固体，当Br - 浓度达0.1mol·L -1 时，通过计算说明能否生成AgBr沉淀，能否通过改变氨水浓度来阻止AgBr沉淀生成。
【简答题】C’est hôtel.
【单选题】1 mol·L-1 Ag(NH3)2+ 的 1 mol·L-1 NH3溶液与 1 mol·L-1 KCl 溶液等体积混合,通过计算说明,有无沉淀生成?( )。Ag-NH3:lgβ1,β2==3.24,7.05;Ksp,AgCl=10-9.74
A.
有
B.
无
C.
不确定
D.
二者不反应
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