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The molar conductance of NaCl, HCl and C...

The molar conductance of NaCl, HCl and `CH_(3)COONa` at infinite dilution are 126.45, 426.16 and 91 `ohm^(-1) cm^(2) mol^(-1)` respectively. The molar conductance of `CH_(3)COOH` at infinite dilution is :

A

`201.28ohm^(-1)cm^(2)mol^(-1)`

B

`390.71ohm^(-1)cm^(2)mol^(-1)`

C

`698.28ohm^(-1)cm^(2)mol^(-1)`

D

`540.48ohm^(-1)cm^(2)mol^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
B
`(^^)_(m)^(@)(CH_(3)COOH)`
`=(^^)^(@)(CH_(3)COONa)+(^^)^(@)(HCl)-(^^)^(@)(NaCl)`
`=91+426.16-126.45=390.71ohm^(-1)cm^(2)mol^(-1)`
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The molar conductance of NaCl,HCl and CH_3COONa at infinite dilution are 126.45,426.16 and 91.0 Scm^2mol^(-1) respectively. The molar conductance of CH_3COOH at infinite dilution is

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Knowledge Check

  • The molar conductances of NaCI, HCI and CH_3 COONa at infinite dilution are 12.45, 426. 16 and 91 "ohm"^(-1) cm^2 "hol"^(-1) respectively. The molar conductance of CH_3COOH at infinite dilution is .

    A
    `201 . 28 "ohm"^(-1) cm^2 "mlo"^(-1)`
    B
    ` 698. 28 "ohm"^(-1) cm^(-1) "mlo"^(-1)`
    C
    ` 390.71 "ohm"^(-1) cm^(2) "mol"^(-1) `
    D
    ` 540. 48 "ohm"^(-1) mol"^(-1)`

  • Equivalent conductances of NaCl, HCl and CH_(3)COONa at infinite dilution are 126.45, 426.16 and 91 ohm^(-1) cm^(2) eq^(-1) respectively. The equivalent conductance of CH_(3)COOH at infinite dilution would be :

    A
    `101.38 ohm^(-1) cm^(2) eq^(-1)`
    B
    `253.62 ohm^(-1) cm^(2) eq^(-1)`
    C
    `390.71 ohm^(-1) cm^(2) eq^(-1)`
    D
    `678.90 ohm^(-1) cm^(2) eq^(-1)`

  • At 18^(@)C , the conductance of H^(+) ions and CH_(3)COO^(-) ions at infinite dilution are 315 and 35 mho cm^(2) eq^(-1) respectively. The equivalent conductance of CH_(3)COOH at infinite dilution is ( mho cm^(2) " equiv"^(-1) )

    A
    280
    B
    350
    C
    30
    D
    j315

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