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The equivalent conductances of two stron...

The equivalent conductances of two strong electrolytes at infinite dilution in `H_2 O` (where ions move freely through a solution) at `25^@C` are given below:
`Lambda_(CH_3COOH)^@ = 91.0 S cm^@//`equiv
`Lambda_(HCI)^@ =42.2 S cm^2//`equiv
What additional information`//`quantity one needs to calculate `Lambda^@` of an aqueous solution of acetic actid ?

A

`Lambda^o` of `NaCI`

B

` Lambda^o` of `CH_3 COOK`

C

The limiting equivlent conductance of ` H^(+) (lambda_(H+)^o)`

D

`Lambda^@` of chloracetic acid `(CICH_2COOH)`

Text Solution

Verified by Experts

The correct Answer is:
A
For Kohlrausch's law ,
`Lambda_(CH_3COOH)^2 = Lambda_(CH_3COONa)^@ + Lambda_(HCI)^@` .
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The equivalent conductances of two strong electrolytes at infinite dilution in H_(2)O (where ions move freely through a solution) at 25^(@)C are given below : Lambda_(CH_(3)COONa)^(@) = 91.0 S cm^(2)//"equi v" . Lambda_(HCl)^(@) = 426.2 S cm^(2)//"equiv" . What additional information//quantity one need to calculate Lambda^(@) of an aqueous solution of acetic acid ?

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The equivalent conductance of two strong electrolytes at infinite dilution in H_(2)O (where ions move freely through a solution) at 25^(@)C are given below: A_(CH_(3)COONa)^(@)=91.0S cm^(2)//"equiv" A_(HCl)^(@)=426.25cm^(2)//"equiv" What additional information/quantity one needs to calculate A^(@) of an aqueous solution of acetic acid?

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The molar conductance of acetic acid at infinite dilution if Lambda^@ for CH_3 COONa,NACI and HCI are 91.0, 126.5 and 426.2 S cm^2 "mol"^(-1) respectively is :

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The equivalent conductances of CH_(3)COONa, HCI "and" NaCI at infinit e dilution are 91,426 an 126 S cm^(2) eq^(-1) respecitvely at 25^(2)C The equivalent consductance of 1 M CH_(3)CIIH solution is 19.55 S cm^(2) eq^(-1) The pH of solution is (pK_(a)=4.74)

A2Z-ELECTROCHEMISTRY-Section D - Chapter End Test
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  2. Faraday's laws of electrolysis are related to

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  3. The requrierd charege for one equivalent weifht of silver deposited on...

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  4. The anode mud obtained during electrorefining of copper may contain.

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  5. Conductance (Siemens, S) is directly proportional to the area of the v...

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  6. Given l//a=0.5 cm^(-1), R= 50 "ohm", N= 1.0. The equivalent conductanc...

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  7. The molar conductances of NaCI, HCI and CH3 COONa at infinite dilution...

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  8. The position of some metals in the electrochemical series in decreasin...

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  9. The standard potentials at 298 K for the following halfreactions are a...

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  10. A solution containing one mole per litre of each Cu(NO(3))(2), AgNO(3)...

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  11. When a copper wire is placed I a solution of AgNO3, the solution acqu...

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  12. The standard reduction potential for Fe^(2+) //Fe and Sn^(2+) //Sn ele...

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  13. For the redox change , Zn(s) + underset (0.1M)FuCu^2+ rarr underset...

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  14. Standared reduction electrode potenitals of three metals A, B and C ...

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  15. The standard emf of a cell having one electron change is found to be 0...

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  16. For the electrochemical cell, (M|M^(o+))||(X^(c-)|X), E^(c-).((M^(o+)|...

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  17. Given : (i) CU^(2+) + 2e^- rarr Cu, E^@ = 0.337 V (ii) Cu^(2+) +e...

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  18. In a cell that untillizes the reaction , Zn((s)) + 2 H((aq))^+ rarr ...

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  19. The standard emf of a cell having one electron change is found to be 0...

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  20. The mass of copper deposited from a solution of CuSO4 by passage of 45...

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  21. A solution of a salt of a metal was electrolysed for 150 minutes wit...

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