Salt Hydrolysis Flashcards
1
Q
Cation
A
Metallic cation;
Non-metallic and conjugate acid of weak base
2
Q
2 types of metallic cation
A
High charge density-> hydrolysis;
eg: [Fe(H2O)6]3+ <=> [Fe(H2O)6]2+ + H+
Low charge density-> no hydrolysis
3
Q
An eg of non-metallic and conjugate acid of a weak base
A
NH4+
NH4+ +H20 <=> NH3+ + H3O+
4
Q
Two types of anions
A
Conjugate base of
Strong acid: SO42-, Cl-, NO3-;
No hydrolysis
Weak acid (buffer sol):
A- + H2O <=> HA + OH-
Hydrolysis
5
Q
Describe the buffet system controlling pH
A
Small amt of acid:
HCO3- + H3O+ -> H2CO3 + H2O
Small amt of base:
HCO3- + OH- -> CO32- + H2O
6
Q
What is a buffer solution?
A
solution that resists changes in pH when a small amt of acid or alkali is added
