※ [本文轉錄自 Chemistry 看板]
作者: axylus (新生活運動@@) 看板: Chemistry
標題: 幾題成大的普化轉考題....
時間: 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
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?
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作者: iamseed (轉學考 必勝~~~) 看板: TransBioChem
標題: Re: 幾題成大的普化轉考題....
時間: Wed Jul 6 00:21:12 2005
※ 引述《axylus (新生活運動@@)》之銘言：
: ※ [本文轉錄自 Chemistry 看板]
: 作者: axylus (新生活運動@@) 看板: Chemistry
: 標題: 幾題成大的普化轉考題....
: 時間: 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
我覺得是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
這樣就能求Ｓ
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