Tamil Nadu Board of Secondary EducationHSC Science Class 12th

# The equivalent conductance of MM36 solution of a weak monobasic acid is 6 mho cm2 equivalent−1 and at infinite dilution is 400 mho cm2 equivalent−1. - Chemistry

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The equivalent conductance of "M"/36 solution of a weak monobasic acid is 6 mho cm2 equivalent−1 and at infinite dilution is 400 mho cm2 equivalent−1. The dissociation constant of this acid is ____________.

• 1.25 × 10−6

• 6.25 × 10−6

• 1.25 × 10−4

• 6.25 × 10−5

#### Solution

The equivalent conductance of "M"/36 solution of a weak monobasic acid is 6 mho cm2 equivalent−1 and at infinite dilution is 400 mho cm2 equivalent−1. The dissociation constant of this acid is 6.25 × 10−6.

Explanation:

α = Λ/(Λ_∘) = 6/400

Ka = α2C

= 6/400 xx 6/400 xx 1/36

= 6.25 × 10−6

Concept: Conductivity of Electrolytic Solution
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#### APPEARS IN

Tamil Nadu Board Samacheer Kalvi Class 12th Chemistry Volume 1 and 2 Answers Guide
Chapter 9 Electro Chemistry
Evaluation | Q 17. | Page 64
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