Q191
Ligand adsorption of weak acid anion is maximum at a pH which is
A.
Equal to pK of weak acid
AnswerB.
Greater than 10 times of pK
C.
Less than 10 times of pK
D.
Independent of pK
Answer: Option A
Solution
Answer: Option A
Solution:
Ligand adsorption of weak acid anion is maximum at a pH that is equal to the pK of a weak acid. pK is a measure of the strength of an acid on a logarithmic scale. And pK value is given by log10(1/Ka), where Ka is the acid dissociation constant.The mode of adsorption of ligands depends on the bond polarity of the linking atoms of the ligand.