作者jasonfghx (工人)
看板NTUCH-101HW
标题[分析] 第一次期中
时间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.谁会阿!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
干
7. 2.26*10^-10M
8. 2>1>4>5>3 邻位:o(ortho) 间位:m(meta) 对位;p(para)
其实我不会分
9. Al3+ Al(OH)2+ Al(OH)3
10. NH4 +> Fe3+ >Fe2+ > Ca2+ >Na+
11.大神快帮忙解答
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(沉淀)
Fe3+ +SCN- ->FeSCN2+(沉淀) 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- 可丢出proton or 接收 proton
Zwitterion : 如amino acid 在neutral molecule中同时有正电或负电
3.isoionic point :将中性Zwitterion丢入水中溶解而呈现的pH
isoeletric point:在水中平均ION 带电=0此时之pH
4.blank titration 避免因indicator消耗及眼判断而造成的systematic error
standardization利用一级标准品确认滴定液正确concentration
5. quantitative 作定量分析 how much
quanlitative 看到底是什麽
酸和硷
1-3自己证
4.gran plot 可由作图求slope求Ka由intercept找当量点
5.自己画
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 使该buffer 1L pH变化1所加base or acid之体积
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
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