Chapter 15 - Complexation and Precipitation Reactions and Titrations Flashcards
Complexation Reaction
Complex Forming Agents
Organic Compounds
Inorganic Complexing agents
Definition of Ligand
Examples of Ligand
Inorganic ligands: H2O, NH3, halides, Organic Ligands: EDTA
Coordination Number
Examples of Coordination Number
Complexometric Titration (in simple definition)
Chelate
Chelate example
What is Dentates?
Comes from Latin word “dentatus” and means having toothlike projections (donor groups).
What is Unidentate?
Single-toothed.
* Ligandthathassingledonorgroup.
* Ex.:NH3
What is Bidentate?
- Double-toothed.
- Ligand that has 2 donor groups.
- Ex.Glycine.
Macrocycles
Examples of Macrocycle
What happens when ligand is capable of protonation?
If ligand is capable of protonation, control can also be accomplished by combination of complexation and pH adjustment.
Complexometric Titrations (
What are titrations with AgNO3 called?
Argentometric Titration
Ions that form precipitates with solubility products greater than ____ do not yield satisfactory end points
10^-10 (ie. BrO3-)
For the following ions, the indicator choosen should change colour in what pAg region to minimize titration errors?
* A)I-
* B)Cl-
* C)IO3-
Volhard Method
Applications of Volhard Method
Mohr Method
Fajans Method
Why are the applications limited in Fajans method?
Few precipitation titrations form colloidal precipitates rapidly.
What two requirements does an ideal indicator for an Argentometric titration have to meet?
In what respect is the Fajans method superior to the Volhard method for the titration of Cl-?
