作者jasonfghx (工人)
看板NTUCH-101HW
標題[分析] 第一次期中
時間Fri Dec 11 17:43:19 2009
填充
1.2CH3COOH->CH3CO2- +CH3CO2H2+
2. 0.1M
3. [Cl-]=2[Hg2+]0=2{[Hg2 2+]+[Hg2(NH3)2+]+[Hg2(NH3)2 2+]}
4. 0.0158
5.
7.3
6.誰會阿!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
幹
7. 2.26*10^-10M
8. 2>1>4>5>3 鄰位:o(ortho) 間位:m(meta) 對位;p(para)
其實我不會分
9. Al3+ Al(OH)2+ Al(OH)3
10. NH4 +> Fe3+ >Fe2+ > Ca2+ >Na+
11.大神快幫忙解答
12.24.19
13. 1.93 11.16 6.03
comparison
1. Volhard titration Ag+ +Cl- ->AgCl filter the AgCl titrate Ag+ with KSCN
in the presence of Fe3+. Ag+ +SCN- ->AgSCN(沉澱)
Fe3+ +SCN- ->FeSCN2+(沉澱) red. the color of the end point is red
Fajans titration :the Ag+ is less than Cl- prior the equivalence point
the surface of AgCl is negative.
After the end point, Ag+ is excess and the surface is positive.
this method use an anionic indicator. the negatively charged indicator is
attracted to the positively charged surface of AgCl and change the color
2. Amphiprotic: 如HCO3- 可丟出proton or 接收 proton
Zwitterion : 如amino acid 在neutral molecule中同時有正電或負電
3.isoionic point :將中性Zwitterion丟入水中溶解而呈現的pH
isoeletric point:在水中平均ION 帶電=0此時之pH
4.blank titration 避免因indicator消耗及眼判斷而造成的systematic error
standardization利用一級標準品確認滴定液正確concentration
5. quantitative 作定量分析 how much
quanlitative 看到底是什麼
酸和鹼
1-3自己證
4.gran plot 可由作圖求slope求Ka由intercept找當量點
5.自己畫
6.20mL ４.58
25mL 2.56
30mL 1.96
40mL 1.84
55mL 1.69
60mL 1.6
8.add 25mL major H2A- H3A second
add 55mL H3A major H2A- second
9. pH=3 6.87E-6
6 6.97E-3
7 0.04285
10.
β=dCb/dpH 使該buffer 1L pH變化1所加base or acid之體積
11. pH=pKa
12.7.03 6.99
activity
1.
2.
3.Al(NO3)3> Mg(NO3)2> NaNO3
4.6.7E-5
5.-0.456
6.
7.1.46
※ 編輯: jasonfghx 來自: 140.112.7.59 (12/11 17:54)
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