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Kohlrausch Law

At 25∘ C mola...

Question

At $25^{\circ} C$ molar conductance of 0.1 molar aqueous solution of ammonium hydroxide is $9.54 o h m^{- 1} c m^{2} m o l^{- 1}$ and at infinite dilution its molar conductance is $238 o h m^{- 1} c m^{2} m o l^{- 1}$ . The degree of ionisation of ammonium hydroxide at the same concentration and temperature is

A

4.008%

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B

40.800%

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C

2.080%

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D

20.800%

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Solution

The correct option is A 4.008%
Degree of dissociation
$(α) = \frac{M o l a r c o n d u c t i v i t y a t c o n c . C (A_{m}^{c})}{M o l a r c o n d u c t i v i t y a t i n f i n i t e d i l u t i o n (A_{m}^{\infty})}$
$α = \frac{9.54 Ω^{- 1} c m^{2} m o l^{- 1}}{238 Ω^{- 1} c m^{2} m o l^{- 1}} = 0.04008 = 4.008 %$

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25^{\circ} C

molar conductance of 0.1 molar aqueous solution of an ammonium hydroxide is

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

and at infinite dilution its molar conductance is

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

. The degree of ionization of ammonium hydroxide at the same concentration and temperature is ?

25^{\circ} C

, molar coductance of 0.1 molar aqueous solution of ammonium hydroxide is

9.54

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

and at infinite dilution its molar conductance is

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

. The degree of ionisation of ammonium hydroxide at the same concentration and temperature is:

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molar conductance of

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[1 Mark]

Q. At 25C molar conductance of 0.1 molar aqueous solution of ammonium hydroxide is 9.54

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

and at infinite dilution its molar conductance is 238

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

. The degree of ionisation of ammonium hydroxide at the same concentration and temperature is:

25^{\circ} C

molar conductance of 0.1 molar aqueous solution of ammonium hydroxide is

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

and at infinite dilution its molar conductance is

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

. The degree of ionisation of ammonium hydroxide at the same concentration and temperature is

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