Chapter 15 - Complexation and Precipitation Reactions and Titrations

Question 1

Complexation Reaction

Question 3

Complex Forming Agents

Question 4

Organic Compounds

Question 5

Inorganic Complexing agents

Question 6

Definition of Ligand

Question 7

Examples of Ligand

Answer 7

Inorganic ligands: H2O, NH3, halides, Organic Ligands: EDTA

Question 8

Coordination Number

Question 9

Examples of Coordination Number

Question 10

Complexometric Titration (in simple definition)

Question 11

Chelate

Question 12

Chelate example

Question 13

What is Dentates?

Answer 13

Comes from Latin word “dentatus” and means having toothlike projections (donor groups).

Question 14

What is Unidentate?

Answer 14

Single-toothed.
* Ligandthathassingledonorgroup.
* Ex.:NH3

Question 15

What is Bidentate?

Answer 15

• Double-toothed.
• Ligand that has 2 donor groups.
• Ex.Glycine.

Question 16

Macrocycles

Question 17

Examples of Macrocycle

Question 18

What happens when ligand is capable of protonation?

Answer 18

If ligand is capable of protonation, control can also be accomplished by combination of complexation and pH adjustment.

Question 19

Complexometric Titrations (

Question 20

What are titrations with AgNO3 called?

Answer 20

Argentometric Titration

Question 21

Ions that form precipitates with solubility products greater than ____ do not yield satisfactory end points

Answer 21

10^-10 (ie. BrO3-)

Question 22

For the following ions, the indicator choosen should change colour in what pAg region to minimize titration errors?
* A)I-
* B)Cl-
* C)IO3-

Question 23

Volhard Method

Question 24

Applications of Volhard Method

Question 25

Mohr Method

Question 26

Fajans Method

Question 27

Why are the applications limited in Fajans method?

Answer 27

Few precipitation titrations form colloidal precipitates rapidly.

Question 28

What two requirements does an ideal indicator for an Argentometric titration have to meet?

Question 29

In what respect is the Fajans method superior to the Volhard method for the titration of Cl-?