Chemistry Exam > Chemistry Questions > Starting from Outwald dilution law, derive a ...
Start Learning for Free
Starting from Outwald dilution law, derive a suitable expression to obtain the equivalent conductance value at infinite dilution (Ao) and dissociation constant (K) of acetic acid from conductance measurement.?
Most Upvoted Answer
Starting from Outwald dilution law, derive a suitable expression to ob...
Outwald Dilution Law:
The Outwald dilution law states that the equivalent conductance of an electrolyte at infinite dilution is equal to the sum of the equivalent conductance of its cations and anions at infinite dilution.
Derivation of the Expression:
- According to Outwald dilution law, the equivalent conductance (Λ) at infinite dilution (Λo) is given by:
Λo = Λc+ + Λa-
- For a weak electrolyte like acetic acid (CH3COOH), it undergoes partial dissociation in solution:
CH3COOH ⇌ CH3COO- + H+
- The degree of dissociation (α) is given by:
α = √(K/C)
- Where K is the dissociation constant and C is the molar concentration of the acid.
- The equivalent conductance of acetic acid at infinite dilution is given by:
Λo(CH3COOH) = Λo(CH3COO-) + Λo(H+)
- Substituting the values of Λo from Outwald dilution law:
Λo(CH3COOH) = Λo(CH3COO-) + Λo(H+)
Λo(CH3COOH) = Λ(CH3COO-) + Λ(H+)
- Using the relation between equivalent conductance and degree of dissociation:
Λ(CH3COO-) = Λo(CH3COO-) / α
Λ(H+) = Λo(H+) / α
- Substituting these values into the previous equation:
Λo(CH3COOH) = Λo(CH3COO-) / α + Λo(H+) / α
Λo(CH3COOH) = Λo(CH3COO-) + Λo(H+)
- Finally, by comparing this equation with the Outwald dilution law equation, we can determine the values of Λo(CH3COO-) and Λo(H+) which can be used to calculate the dissociation constant (K) of acetic acid.
The Outwald dilution law states that the equivalent conductance of an electrolyte at infinite dilution is equal to the sum of the equivalent conductance of its cations and anions at infinite dilution.
Derivation of the Expression:
- According to Outwald dilution law, the equivalent conductance (Λ) at infinite dilution (Λo) is given by:
Λo = Λc+ + Λa-
- For a weak electrolyte like acetic acid (CH3COOH), it undergoes partial dissociation in solution:
CH3COOH ⇌ CH3COO- + H+
- The degree of dissociation (α) is given by:
α = √(K/C)
- Where K is the dissociation constant and C is the molar concentration of the acid.
- The equivalent conductance of acetic acid at infinite dilution is given by:
Λo(CH3COOH) = Λo(CH3COO-) + Λo(H+)
- Substituting the values of Λo from Outwald dilution law:
Λo(CH3COOH) = Λo(CH3COO-) + Λo(H+)
Λo(CH3COOH) = Λ(CH3COO-) + Λ(H+)
- Using the relation between equivalent conductance and degree of dissociation:
Λ(CH3COO-) = Λo(CH3COO-) / α
Λ(H+) = Λo(H+) / α
- Substituting these values into the previous equation:
Λo(CH3COOH) = Λo(CH3COO-) / α + Λo(H+) / α
Λo(CH3COOH) = Λo(CH3COO-) + Λo(H+)
- Finally, by comparing this equation with the Outwald dilution law equation, we can determine the values of Λo(CH3COO-) and Λo(H+) which can be used to calculate the dissociation constant (K) of acetic acid.
|
Explore Courses for Chemistry exam
|
|
Similar Chemistry Doubts
Starting from Outwald dilution law, derive a suitable expression to obtain the equivalent conductance value at infinite dilution (Ao) and dissociation constant (K) of acetic acid from conductance measurement.?
Question Description
Starting from Outwald dilution law, derive a suitable expression to obtain the equivalent conductance value at infinite dilution (Ao) and dissociation constant (K) of acetic acid from conductance measurement.? for Chemistry 2024 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about Starting from Outwald dilution law, derive a suitable expression to obtain the equivalent conductance value at infinite dilution (Ao) and dissociation constant (K) of acetic acid from conductance measurement.? covers all topics & solutions for Chemistry 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Starting from Outwald dilution law, derive a suitable expression to obtain the equivalent conductance value at infinite dilution (Ao) and dissociation constant (K) of acetic acid from conductance measurement.?.
Starting from Outwald dilution law, derive a suitable expression to obtain the equivalent conductance value at infinite dilution (Ao) and dissociation constant (K) of acetic acid from conductance measurement.? for Chemistry 2024 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about Starting from Outwald dilution law, derive a suitable expression to obtain the equivalent conductance value at infinite dilution (Ao) and dissociation constant (K) of acetic acid from conductance measurement.? covers all topics & solutions for Chemistry 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Starting from Outwald dilution law, derive a suitable expression to obtain the equivalent conductance value at infinite dilution (Ao) and dissociation constant (K) of acetic acid from conductance measurement.?.
Solutions for Starting from Outwald dilution law, derive a suitable expression to obtain the equivalent conductance value at infinite dilution (Ao) and dissociation constant (K) of acetic acid from conductance measurement.? in English & in Hindi are available as part of our courses for Chemistry.
Download more important topics, notes, lectures and mock test series for Chemistry Exam by signing up for free.
Here you can find the meaning of Starting from Outwald dilution law, derive a suitable expression to obtain the equivalent conductance value at infinite dilution (Ao) and dissociation constant (K) of acetic acid from conductance measurement.? defined & explained in the simplest way possible. Besides giving the explanation of
Starting from Outwald dilution law, derive a suitable expression to obtain the equivalent conductance value at infinite dilution (Ao) and dissociation constant (K) of acetic acid from conductance measurement.?, a detailed solution for Starting from Outwald dilution law, derive a suitable expression to obtain the equivalent conductance value at infinite dilution (Ao) and dissociation constant (K) of acetic acid from conductance measurement.? has been provided alongside types of Starting from Outwald dilution law, derive a suitable expression to obtain the equivalent conductance value at infinite dilution (Ao) and dissociation constant (K) of acetic acid from conductance measurement.? theory, EduRev gives you an
ample number of questions to practice Starting from Outwald dilution law, derive a suitable expression to obtain the equivalent conductance value at infinite dilution (Ao) and dissociation constant (K) of acetic acid from conductance measurement.? tests, examples and also practice Chemistry tests.
|
|
Explore Courses for Chemistry exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup