Q.15 What is mean by hydrolysis? Derive ostwald's dilution law for weak acid
Answers
Answered by
0
Answer is:-
Usually hydrolysis is a chemical process in which a molecule of water is added to a substance.
In case of a weak electrolyte at a given temperature, the degree of ionization is inversely proportional to the square root of the molar concentration or directly proportional to square root of the volume of the solution which contains one mole of the electrolyte. This is called Ostwald's dilution Law
Answered by
0
Explanation:
Ostwald's dilution law relates the dissociation constant of the weak electrolyte with the degree of dissociation and the concentration of the weak electrolyte. Consider the dissociation equilibrium of CH
3
COOH which is a weak electrolyte in water.
CH
3
COOH⇌CH
3
COO
−
+H
+
K
a
=
[CH
3
COOH]
[CH
3
COO
−
][H
+
]
α=degree of dissociation of acetic acid.
∴K
a
=
(1−α)C
αC×αC
K
a
=
1−α
α
2
C
Ostwald's dilution law
If α is too small, K
a
=α
2
C
α
2
C=K
a
α
2
=
C
K
a
α=
C
K
a
[H
1
]=Cα
=C
C
K
a
=
C
K
a
C
2
=
K
a
C
∴[H
+
]=
K
a
C
K
a
=α
2
C−Ostwald's dilution law for weak acid.
K
b
=α
2
C−Ostwald's dilution law for weak base.
Similar questions