Electrolyte - -Scm2mol-1KCl 149-9KNO 3 145-0HCl 426-2NaOAc 91-0NaCl 126-5Calculate -HOAc using appropriate molar conductances of the electrolytes listed above at infinite dilution in H2O at 25 0C-

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Standard XII

Chemistry

Kohlrausch Law

Electrolyte ...

Question

Electrolyte $\land^{\infty} (S c m^{2} m o l^{- 1})$
KCl 149.9
KNO $_{3}$ 145.0
HCl 426.2
NaOAc 91.0
NaCl 126.5
Calculate $\land {^{\infty}}_{H O A c}$ using appropriate molar conductances of the electrolytes listed above at infinite dilution in $H_{2} O$ at 25 $^{0}$ C:

217. 5

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390.7

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552.7

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517.2

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Solution

The correct option is B 390.7
According to Kohlrausch law of independent migration of ions, the molar conductivity of an electrolyte at infinite dilution is equal to the sum of the contributions of the molar conductivities of its ions.
Hence,
$Λ_{H O A c}^{\infty} = Λ_{H +}^{\infty} + Λ_{A c O -}^{\infty}$

$= Λ_{N a O A c}^{\infty} + Λ_{H C l}^{\infty} - Λ_{N a C l}^{\infty}$

Substitute the values in the above equation:

$Λ_{H O A c}^{\infty} = 91.0 + 426.2 - 126.5 = 390.7 Ω^{- 1} {c m}^{2} {m o l}^{- 1} .$

Option B is correct.

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Similar questions

Electrolyte $\land^{\infty} (S c m^{2} m o l^{- 1})$

$K C l$ 149.9

$K N O_{3}$ 145.0

$H C l$ 426.2

$N a O A c$ 91.0

$N a C l$ 126.5

Calculate $Λ {^{\infty}}_{H O A c}$ using appropriate molar conductances of the electrolytes listed above at infinite dilution with $H_{2} O$ at 25 $^{o}$ C?

Electrolyte	$K C l$	$K {N O}_{3}$	$H C l$	$N a O A c$	$N a C l$
$Λ^{\infty} (S {c m}^{2} {m o l}^{- 1})$	$149.9$	$145.0$	$426.2$	$91.0$	$126.5$

Calculate

{Λ^{\infty}}_{H O A c}

using appropriate molar conductances of the electrolytes listed above at infinite dilution in

H_{2} O

25^{o} C

Q. Calculate

Δ_{H O A c}^{\infty}

(i n S c m^{2} m o l^{- 1})

using appropriate molar conductances of the electrolytes listed in the given table at infinite dilution in

H_{2} O

25^{0}

Electrolyte	KCl	KNO $_{3}$	HCl	NaOAc	NaCl
$Δ^{\infty} (S c m^{2} m o l^{- 1}$	149.9	145.0	426.2	91.0	126.5

Q. Calculate

Λ_{H N O_{3}}^{0}

and

Λ_{H O A c}^{0}

using appropriate molar conductances of the electrolytes listed below at infinite dilution in

H_{2} O

25^{\circ} C

Electrolyte	$Λ^{0} (S c m^{2} m o l^{- 1})$
$K C l$	$149.9$
$N a C l$	$126.5$
$H C l$	$426.2$
$K N O_{3}$	$145.0$
$N a O A c$	$91.0$

Electrolyte	$K C l$	$K N O_{3}$	$H C l$	$N a O A c$	$N a C l$
$Λ^{\infty} {(Scm}^{2} {mol}^{- 1})$	$149.9$	$145$	$426.2$	$91$	$126.5$

Calculate

Λ_{H O A c}^{\infty}

using appropirate molar conductances of the electrolytes listed above at infinite dilution in

H_{2} O

25^{o} C

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Electrolyte ∧∞(Scm2mol−1)KCl 149.9KNO3 145.0HCl 426.2NaOAc 91.0NaCl 126.5Calculate ∧∞HOAc using appropriate molar conductances of the electrolytes listed above at infinite dilution in H2O at 250C:

Electrolyte $\land^{\infty} (S c m^{2} m o l^{- 1})$
KCl 149.9
KNO $_{3}$ 145.0
HCl 426.2
NaOAc 91.0
NaCl 126.5
Calculate $\land {^{\infty}}_{H O A c}$ using appropriate molar conductances of the electrolytes listed above at infinite dilution in $H_{2} O$ at 25 $^{0}$ C: