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Electrochemistry

Question

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Molar conductivities (Λ^o_m) at infinite dilution of NaCl, HCl and CH₃COONa are 126.4, 425.9 and 91.0 S Cm² mol^-1 respectively. Λ^o_m for CH₃COOH will be

425.5 S cm² mol^-1

180.5 S cm² mol^-1

290.8 S cm² mol^-1

390.5 S cm² mol^-1

Solution

D.

390.5 S cm² mol^-1

CH₃COONa +HCl → NaCl + CH₃COOH
91 + 425.9 = 126.4 + x
x= 516.9 -126.4
= 390.5 S cm² mol^-1

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