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Standard XII

Chemistry

Variation of Specific, Equivalent and Molar Conductivities with Concentration

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Question

From the following molar conductivities at infinite dilution Calculate molar conductivity of aloh3 from al2so43 nh4oh nh42

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Similar questions

Q. What will be the molar conductivity of

A l^{3 +}

ions at infinite dilution if molar conductivity of

A l_{2} (S O_{4})_{3}

858

S . c m^{2}

m o l^{- 1}

and ionic conductance of

S O_{4}^{2 -}

160

S . c m^{2}

m o l^{- 1}

at infinite dilution?

The molar conductance of $N H_{4} O H$ at 0.01 M concentration is 11.3 $o h m^{- 1} c m^{2} m o l^{- 1}$ . The degree of dissociation of $N H_{4} O H$ is: (Molar conductance at infinite dilution = 271.1 $o h m^{- 1} c m^{2} m o l^{- 1}$

Q. Calculate molar conductivity of

H C O O H

at infinite dilution, if equivalent conductivity of

H_{2} S O_{4} = x_{1}, A l_{2} (S O_{4})_{2} = x_{2}, (H C O O)_{3} A l = x_{3}

Q. From the following molar conductivities at infinite dilution,

Λ_{m}^{o} for A l_{2} {(S O_{4})}_{3} = 858 S c m^{2} m o l^{- 1}

Λ_{m}^{o} for N H_{4} O H = 238.3 S c m^{2} m o l^{- 1}

Λ_{m}^{o} for {(N H_{4})}_{2} S O_{4} = 238.4 S c m^{2} m o l^{- 1}

calculate

Λ_{m}^{o} for A l {(O H)}_{3}

Q. A

0.05 M

N H_{4} O H

solution offers the resistance of

50 o h m

to a conductivity cell at

298 K

. If the cell constant is

0.50 {c m}^{- 1}

and molar conductance of

N H_{4} O H

at infinite dilution is

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

, calculate :

(i) Specific conductance
(ii) Molar conductance
(iii) Degree of dissociation

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