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Coordinate titration

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Title: Author- - Last modified by: DELL Created Date: 8/23/1998 1:13:29 AM Document presentation format: – PowerPoint PPT presentation

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Title: Coordinate titration


1
  • ?????
  • Coordinate titration

2
????
  • ????
  • EDTA??????????????
  • ?????????????
  • EDTA?????
  • ?????
  • ????

3
??????
  • ?????????????????????????
  • ???????????
  • ??????????
  • ?????
  • ????
  • ?????(???????)?

4
??EDTA????
  • EDTA??????(Ethylene-diamine tetraacetic
    acid),H4Y???
  • EDTA??????,???????????,???????????????,??????????
    ??????????,Na2H2Y2H2O,?????EDTA?
  • Na2H2Y2H2O???????????,???????????????,???????

5
EDTA???
HOOCCH2
CH2COO-
H
H
N-CH2-CH2-N
-OOCCH2
CH2COOH
6
EDTA??????????
  • ?????????????
  • ?????????????,???????????,??????????
  • ?????,????11
  • EDTA???????????????,??????????
  • EDTA????????????????????

7
???????????????
  • 1?????????
  • M Y MY
  • KMY MY/MY

8
2???????????
  • ????????EDTA??????
  • ???
  • ?????H???,?M?Y????????????
  • ?????
  • ??????

9
3??????????
  • lg c KMY 6

10
??EDTA?????
  • ??????????lgKMY????pH?????

11
???????
  • ????????????????????,????????????????????
  • ????????????????,???????????????,????????????

12
???????????
  • ???????????????????????????????????
  • ??????????????????????EDTA???????????????
  • ?????????????????
  • ????????????????????????,??????????
  • ???????????,????????

13
???????
  • ??T(EBT)?????,??????,????,?????H2In-??,???pH??,??
    ???????pH???9-10,??????????

H2In- HIn-2
In-3 pH lt6.3 8-11
gt11.5 ??? ??
???
NO2
14
  • ???? Zn2?Mg2?Cd2?Pd2 ??
  • ????Ca2?,?????,???????????
  • ????(NN)
  • ?????,??????,????????,???NaCl????????????
  • ?pH13?,??????????,?????????????

H2In- HIn-2
In-3 pH lt7.4 8-13
gt13.5 ??? ??
???
15
??EDTA??????????
  • EDTA?????Na2H2Y2H2O??,???0.02-0.1mol/L
  • ??????ZnO?CaCO3?MgO??

16
??????--???????
  • ????????????????????
  • ????Ca(HCO3)2 ?Mg (HCO3)2
  • ???
  • ????CaSO4?CaCl2 ?Ca(NO3)2

17
???????
  • ???1????????????????10??????,??1????
  • 1??? 1L????10mg CaO
  • ?????????????????1L????CaCO3?mg????

18
????
  • Ca2 HIn2- CaIn-
    H
  • (??) (??)
  • Mg2 HIn2- MgIn- H
  • H2Y2- CaIn- CaY2- HIn2-
    H
  • (??) (??)
  • H2Y2- MgIn- MgY2- HIn2-
    H
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