Pharmacy - Complex titrations - v8 (2010).ppt ...

Forming reactionsComplex forming reactionsComplex forming reactionsComplex forming reactionsand complexometryand complexometryG bor Galb csG bor Galb csMixing of salt solutions usually does not result in any observablechanges. The properties of the species originally present persistand no new properties can be detected ( no precipitate, nocolor change, etc.). Examples: Complex forming reactionsComplex forming reactionsBut it is not always the see, for instance:FeCl3+ KF ?yellow colorless colorless NaCl + KNO3 or ZnSO4+ MgCl2 CoCl2+ KSCN ?pink colorless blueplus, metal ions are also hidden from their usual these cases, the reaction between the ions resulted in theformation ofcomplex ions(compounds): Complex forming reactionsComplex forming reactionsFe3++ 6 F-=[FeF6]3-Co2++ SCN-= [Co(SCN)]+ Complex compounds contain acentral metal ionsurrounded byother ion(s) or molecule(s) neutral molecules ( ammonia, water).

2011.01.10. 1 Complex forming reactions and complexometry Gábor Galbács Mixing of salt solutions usually does not result in any observable changes.

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