In the plot of molar conductivity ( ∧ m ) vs square root of concentration ( c 1 / 2 ) , following curves are obtained for two electrolytes A and B : Answer the following : What happens on extrapolation of ∧ m to concentration approaching zero for electrolytes A and B ?

On extrapolation, for electrolyte, A limiting value of conductance is obtained that is conductance at zero concentration or infinite dilution. However, the conductance of a weak electrolyte never approaches a limiting value. Or in other words, it is not possible to find conductance at infinite dilution (zero concentration).

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Molar conductivity of ionic solution depends on _____.

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Important Questions on Electrochemistry

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Chemistry>Physical Chemistry>Electrochemistry>Conductance in Electrolytic Solutions

What is meant by limiting molar conductance?

EASY

Chemistry>Physical Chemistry>Electrochemistry>Conductance in Electrolytic Solutions

Why limiting molar conductivity of

{CH}_{3} COOH

cannot be determined experimentally?

EASY

Chemistry>Physical Chemistry>Electrochemistry>Conductance in Electrolytic Solutions

What is meant by 'limiting molar conductivity'

HARD

Chemistry>Physical Chemistry>Electrochemistry>Conductance in Electrolytic Solutions

\land_{m}^{o}

for

NaCl, HCl

and

NaA

are

126.4, 425.9

and

100 .5 S {cm}^{2} {mol}^{- 1}

respectively. If the conductivity of

0 .001 M HA

5 \times 10^{- 5} S {cm}^{- 1}

, degree of dissociation of

HA

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Chemistry>Physical Chemistry>Electrochemistry>Conductance in Electrolytic Solutions

In the plot of molar conductivity $(\land_{m})$ vs square root of concentration $(c^{1 / 2})$ , following curves are obtained for two electrolytes A and B :

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Answer the following :

What happens on extrapolation of $\land_{m}$ to concentration approaching zero for electrolytes A and B ?

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Chemistry>Physical Chemistry>Electrochemistry>Conductance in Electrolytic Solutions

Given below are two statements:

Statement I: For $KI$ , molar conductivity increases steeply with dilution.

Statement II: For carbonic acid, molar conductivity increases slowly with dilution. In the light of the above statements, choose the correct answer from the options given below

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Chemistry>Physical Chemistry>Electrochemistry>Conductance in Electrolytic Solutions

Define conductivity of an electrolytic solution. How does it vary with decrease in concentration and why?

HARD

Chemistry>Physical Chemistry>Electrochemistry>Conductance in Electrolytic Solutions

Resistance of 0.2 M solution of an electrolyte is

50 Ω

. The specific conductance of the solution is

{1.4 S m}^{-1}

. The resistance of 0.5 M solution of the same electrolyte is

280 Ω

. The molar conductivity of 0.5 M solution of the electrolyte in

{S m}^{2} {mol}^{-1}

is :

EASY

Chemistry>Physical Chemistry>Electrochemistry>Conductance in Electrolytic Solutions

Consider the statements

S 1

and

S 2

S 1

: Conductivity always increases with decreases in the concentration of electrolyte.

S 2

: Molar conductivity always increases with decreases in the concentration of electrolyte.
The correct option among the following

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Chemistry>Physical Chemistry>Electrochemistry>Conductance in Electrolytic Solutions

Why does the conductivity of a solution decrease with dilution?

HARD

Chemistry>Physical Chemistry>Electrochemistry>Conductance in Electrolytic Solutions

The equivalent conductance of

NaCl

at concentration C and at infinite dilution are

λ_{C}

and

λ_{\infty}

, respectively. The correct relationship between

λ_{C}

and

λ_{\infty}

is given as :
(where the constant B is positive)

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Chemistry>Physical Chemistry>Electrochemistry>Conductance in Electrolytic Solutions

Ionic mobility of

{Ag}^{+}

(λ_{{Ag}^{+}} = 5 \times 10^{- 1} {ohm}^{- 1} {cm}^{2} {eq}^{- 1})

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Chemistry>Physical Chemistry>Electrochemistry>Conductance in Electrolytic Solutions

The pair of electrolytes that possess same value for the constant

(A)

in the Debye - Huckel - Onsagar equation,

λ_{m} = λ_{m} ° - A \sqrt{C}

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Chemistry>Physical Chemistry>Electrochemistry>Conductance in Electrolytic Solutions

What is meant by limiting molar conductivity?

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Chemistry>Physical Chemistry>Electrochemistry>Conductance in Electrolytic Solutions

0.002 M

solution of a weak acid has an equivalent conductance

(Λ) 60 {ohm}^{- 1} {cm}^{2}

{eq}^{- 1}

. What will be the

pH

? (Given :

Λ ° = 400 {ohm}^{- 1} {cm}^{2} {eq}^{- 1}

]

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Chemistry>Physical Chemistry>Electrochemistry>Conductance in Electrolytic Solutions

The molar conductivities of

HCl, NaCl, {CH}_{3} COOH

and

{CH}_{3} COONa

at infinite dilution follow the order

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Chemistry>Physical Chemistry>Electrochemistry>Conductance in Electrolytic Solutions

The molar conductivity of a

0.5 mol {dm}^{- 3}

solution of

A g N O_{3}

with electrolytic conductivity of

5.76 \times 10^{- 3} S c m^{- 1}

298 K

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Chemistry>Physical Chemistry>Electrochemistry>Conductance in Electrolytic Solutions

The molar conductivity of

NaCl, {CH}_{3} COONa

and

HCl

at infinite dilution is

126.45, 91.0

and

426.16 {ohm}^{- 1} {cm}^{2} {mol}^{- 1}

respectively. Calculate the molar conductivity

(λ_{m \infty})

for

{CH}_{3} COOH

at infinite dilution.

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Chemistry>Physical Chemistry>Electrochemistry>Conductance in Electrolytic Solutions

Give reason: Conductivity of

{CH}_{3} COOH

decreases on dilution.

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Chemistry>Physical Chemistry>Electrochemistry>Conductance in Electrolytic Solutions

Which of the following electrolytic solution has the least specific conductance

Molar conductivity of ionic solution depends on _____.

Important Questions on Electrochemistry

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