At 290K the limiting molar conductivity of H + ion and acetate (CH 3 COO - ) ion 1 are 315 and 35 Scm 2 /mol. What will be the limiting molar conductivity of Acetic acid( CH 3 COOH) in Scm 2 /mol
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Given:
Limiting molar conductivity of H⁺ = 315 Scm²mol⁻¹
Limiting molar conductivity of CH₃COO⁻ = 35 Scm²mol⁻¹
To find:
Limiting molar conductivity of CH₃COOH
Solution:
We can find limiting molar conductivity on the basis of Kohlrausch law.
It states that at infinite dilution, ion's molar conductivity does not depends upon the other ions with which it is associated in the electrolyte. It is also known as Law of independent migration of ions.
According to question,
H⁺ + CH₃COO⁻ → CH₃COOH
therefore,
= 315 + 35
= 350 Scm²mol⁻¹
Hence, limiting molar conductivity of acetic acid = 350 Scm²mol⁻¹.
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