Chemistry Class 12 NCERT Solutions: Chapter 3 Electrochemistry Part 7

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Q: 10. The conductivity of sodium chloride at has been determined at different concentrations and the results are given below:

Concentration

Calculate for all concentrations and draw a plot between and . Find the value of .

Answer:

Given,

Then,

Given,

Then,

Given,

Then,

Given,

Then,

Given,

Then,

Now, we have the following data:

Q_10_Conductivity of Sodium Chloride
Q_10_Conductivity of Sodium Chloride

0.0316

0.1

0.1414

0.2236

0.3162

118.5

115.8

111.1

106.74

Q 10 Graph showing (Lambda m) square root of c

Q 10 Graph Showing (Lambda M) Square Root of C

Q 10 Graph showing (Lambda m) square root of c

At zero concentration value of = 124 so that the value of = 124.0

Q: 11. Conductivity of . Calculate its molar conductivity and if for acetic acid is , what is its dissociation constant?

Answer:

Given,

Then, molar conductivity,

Again,

Now,

Dissociation Constant,