QJEEM07Chcc80: JEE Main 2007 Chemistry - Class 12 JEEM07Chcc80 Solution: The equivalent conductances of two strong electrolytes at…

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QJEEM07Chcc80: JEE Main 2007 Chemistry - Class 12 JEEM07Chcc80 Solution: The equivalent conductances of two strong electrolytes at…

The equivalent conductances of two strong electrolytes at infinite dilution in H₂O (where ions move freely through a solution) at 25^oC are given below:

\land_{C H_{3} C O O N a}^{o}

= 91.0 S cm²/equiv

\land_{H C l}^{o}

= 426.2 S cm²/equiv
What additional information/quantity one needs to calculate

\land^{o}

of an aqueous solution of acetic acid?

Multiple Choice Options

A ∧o of chloroacetic acid (C/CH2COOH)
B ∧o of NaCl
C ∧o of CH3COOK
D The limiting equivalent conductance of H+(∧H+o)

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Accepted Answer

NOTE : According to Kohlrausch's law, molar conductivity of weak electrolyte acetic acid

(C H_{3} C O O H)

can be calculated as follows:

{Λ^{o}}_{C H_{3} C O O H} = ({Λ^{o}}_{C H_{3} C O O N a} + {Λ^{o}}_{H C l}) - {Λ^{o}}_{N a C l}

∴

Value of

{Λ^{o}}_{N a C l}

should also be known

for calculating value of

{Λ^{o}}_{C H_{3} C O O H}

QJEEM07Chcc80: JEE Main 2007 Chemistry - Class 12 JEEM07Chcc80 Solution: The equivalent conductances of two strong electrolytes at…

Multiple Choice Options

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