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Standard XII

Chemistry

Hydrochloric Acid

At 25°c the v...

Question

At 25°c the values of molar ionic conductance at infinite dilution of HCL, CH3COONa and NaCl are 456,91.0 and 236 ohm^-1cm^2mol^-1 respectively. If the molar conductance of 0.1M acetic acid solution is 171.05 ohm^-1cm^2mol^-1 what is degree of dissociation of acetic acid?

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Q. Molar conductance of

0.1 M

acetic acid is

7 {o h m}^{- 1} {c m}^{2} {m o l}^{- 1}

. If the molar conductance of acetic acid at infinite dilution is

380.8 {o h m}^{- 1} {c m}^{2} {m o l}^{- 1}

, the value of dissociation constant will be:

Q. At

25^{\circ} C

molar conductance of

0.1

molar aqueous solution of ammonium hydroxide is

9.52

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

and at infinite dilution its molar conductance is

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[1 Mark]

Q. The molar conductance of

0.001 M

acetic acid is

50 o h m^{- 1} c m^{2} m o l^{- 1}

. The maximum value of molar conductance of acetic acid is

250 o h m^{- 1} c m^{2} m o l^{- 1}

. What is the degree of dissociation

(α)

of acetic acid?

The molar conductances of NaCl, HCl and CH₃COONa at infinite dilution are 126.45, 426.16 and 91 ohm^-1 cm² mol^-1 respectively. The molar conductance of CH₃COOH at infinite dilution is

Q. Given the limiting molar conductivity as

_{m}

(HCl)

= 425.9 Ω^{- 1} c m^{2} m o l^{- 1}

_{m}

(NaCl)

= 126.4 Ω^{- 1} c m^{2} m o l^{- 1}

_{m}

(CH3 COONa)

= 91 Ω^{- 1} c m^{2} m o l^{- 1}

The molar conductivity, at infinite dilution, of acetic acid (in

Ω^{- 1} c m^{2} m o l^{- 1}

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