lecture 6

Question 1

What are monodenate ligands?

Answer 1

bind to a metal ion through only one ion

Question 2

What are mutlidenate or chelating ligands?

Answer 2

bind to a metal ion through more than one ligand atome

Question 3

How does EDTA interact?

Answer 3

it has a 1:1 interaction with a metal ion, it has 6 protons, and 2 can be removed from nitrogens and 4 can be removed from oxygens

Question 4

What is the formation constant?

Answer 4

the equilibrium constant for a metal-ligand reaction, the higher the charge on the metal the higher the formation constant will be

Question 5

What is an auxiliary complexing agent?

Answer 5

it is a ligand that binds to the metal strongly enough to prevent metal hydroxides from precipitating

Question 6

What is different about the titrations with EDTA before equivalence point

Answer 6

to calculate the pCa+ it is log -[Ca2+] before equivalence point

Question 7

What is the difference about titrations with EDTA at equivalence point

Answer 7

The concentration of the ion is now in CaY2- so its concentration of the ion times the dilution factor that equals the initial concentration

Question 8

what is the difference about titrations with EDTA after equivalence point?

Answer 8

you find the concentration of EDTA by multiplying the concentration by the dilution factor (volume of excess EDTA over total volume) and you find the volume of Cay2-