作者iamseed (转学考 必胜~~~)
看板TransBioChem
标题Re: 几题成大的普化转考题....
时间Wed Jul 6 00:21:12 2005
※ 引述《axylus (新生活运动@@)》之铭言：
: ※ [本文转录自 Chemistry 看板]
: 作者: axylus (新生活运动@@) 看板: Chemistry
: 标题: 几题成大的普化转考题....
: 时间: Tue Jul 5 03:27:02 2005
: 91-一-10
: at 500K, the ratio of the speeds of HF and HClmolecules is dominated
: by their...
: a)eletric dipole moments b)bond lengths c)molar masses d)molecular sizes
: e)all of the above
我觉得是Ｃ
: 91-二-2
: for a second-order reaction A=>B+C, it takes 3 min for the concentration
: of A drops to its original value [A]o = 0.02mole/L
: a) the rate constant is _____
: b) the time required for the concentration of A decrease from [A]o to
: [A]o/4 is _____ min.
: 90-二-2
: the Kf for the complex ion Ag(NH3)2 is 1.7*10^7. the Ksp for AgCl is
: 1.6*10^(-10). what is the molar solubility of AgCl in 1M NH3?
AgCl-----> Ag+ + Cl- KSP=1.6*10^(-10)
Ag+ + 2NH3------->Ag(NH3)2+ Kf=1.7*10^7
+)-------------------------------------------
AgCl+2NH3-------------> Ag(NH3)2+ +Cl- Kx=KSP×Kfk
1.0-2S S S
这样就能求Ｓ
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