推 YoAndHide:大感謝! 61.230.103.90 07/12 22:33
※ 編輯: pcboy0831 來自: 125.232.2.85 (07/13 17:00)
※ 引述《YoAndHide (Ouch  椁jjjjjjjjj)》之銘言：
: 先謝謝願意看我問題的同學!!~
<< 恕刪 >>
: 二
: 3 A 0.02M solution of H2SO4 has an osmotic pressure of 1.125 atm at 25度C
: Find Ka for HSO4-
π = (iC)RT , 粒子濃度約 i = π/(CRT)
H2SO4 因為強酸, 第一段幾乎全部解離
HA- --> H+ + A2-
1 1 0
-α α α
======================
1-α 1+α α , 總粒子數 i = 2 + α , α = 0.302
Ka = [H+][A2-]/[HA-] = C(1+α)α/(1-α)
= 1.1 * 10^-2
感謝 yiso 版友指正
: 8.Represent the structure of the condensation polymer made from
: 2-hydroxypropanoic acid
C O
OH | ║
| ----> -(-O-C-C-)-
C-C-COOH n
: 95.
: 9. The two salts AgX have very silmilar solubilities in water.
: The salt AgX is much more soluble in acid than is AgY
: What can be said about the relative strengths of the acids HX and HY?
: a. nothing b. HY is strongerthan HX c. HX is stronger then HY
: d. The acids have equal strengths.
AgX is much more soluble in acid , 可能因為比較 basic
若 X- 比 Y- basic , HY 就會比 HX 還要 acid
: 18. For the process X-(g) -> X-(aq) select the ion with the most negative
: value of deltaH
: a. F- b. Cl- c. Br- d. I- e.At-
水合能最大, 選電荷密度最高者(?) , F-
: 19. The color of a transition metal complex results from
: a. bending vibrations b.stretching vibrations c.transition of an electron
: between d orbitals
: d. transition of an electron between an s and a p orbital
: e. nuclear magnetic resonance
Transition of an electrons between d orbitals, 參考錯合物化學
: 二-4
: 為什麼Co(NH3)6 3+ 是逆磁 而Fe(H2O)6 3+是順磁呢?
: 還有請問rate law的order有可能是負的嗎 因為我算一題是-1 ....
: 另外請問有人有寫C卷的想對答案嗎~? 雖然都查過了 還是對一下比較安心
: 謝謝!
Co(NH3)6 3+ , 金屬離子為 Co3+ , 組態 [Ar]d^6
Fe(H2O)6 3+ , 金屬離子為 Fe3+ , 組態 [Ar]d^5
都是過渡元素第三週期, 然而 NH3 為強配位子 > H2O
因此填入電子的時候
↑ ↑
Co3+ ￣￣ ￣￣ Fe3+ ￣￣ ￣￣
↑↓ ↑↓ ↑↓ ↑ ↑ ↑
￣￣ ￣￣ ￣￣ ￣￣ ￣￣ ￣￣
有non pair電子存在, 因此為 paramagnetic
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僅供參考
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