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Reactivity with Halogens and Hydrogen (Group 2)

Limiting mola...

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Limiting molar conductivity of which among thefollowing ion is maximum in water at 298 K(1) H\ast(2) Nat40(3) K\ast(4) Ca2+

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Q. Limiting molar conductivity for some ions is given(in S

c m^{2}

m o l^{- 1}

N a^{+} = 50.1

C l^{-} = 76.3

H^{+} = 349.6

C H_{3} C O O^{-} = 40.9

C a^{2 +} - 119.0

.
What will be the limiting molar conductivities

(Λ_{m}^{o})

C a C l_{2}, C H_{3} C O O N a

N a C l

298 K

, the limiting molar conductivity of a weak monobasic acid is

4 \times 10^{2} S c m^{2} m o l^{- 1}

298 K

, for an aqueous solution of the acid the degree of dissociation is

α

and the molar conductivity is

y \times 10^{2} S c m^{2} m o l^{- 1}

298 K

20

times dilution with water, the molar conductivity of the solution becomes

3 y \times 10^{2} S c m^{2} m o l^{- 1}

y

Q. Limiting molar conductivities of

M g^{2 +}

C l^{-}

ions are 106.0 S.cm

^{2}

^{- 1}

^{2}

^{- 1}

respectively. Calculate the limiting molar conductivity of

M g C l_{2}

The values of limiting ionic conductance of

H^{+}

H C O O^{-}

ions are respectively

347

58 S c m^{2} m o l^{- 1}

. If the molar conductance of 0.025 M methanoic acid at 298 K is

40 S c m^{2} m o l^{- 1}

, the dissociation constant of methanoic acid at 298 K is:

Q. The limiting molar conductivity of a solution is the conductivity at an infinite dilution when there is no interaction between ions.

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