NCERT solution Class 12 electrochemistry

NCERT Solutions

Class 12 Chemistry

Electrochemistry

NCERT Questions

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Q.10

The conductivity of sodium chloride at 298 K has been determined at different concentrations and the results are given below:

Concentration/M 0.001 0.010 0.020 0.050 0.100

10² × κ/S m^–1 1.237 11.85 23.15 55.53 106.74

Calculate Λ_m for all concentrations and draw a plot between Λ_m and c^½. Find the value of Λ⁰_m.

κ = 1.237 × 10⁻² S m⁻¹, c = 0.001 M

Then, κ = 1.237 × 10 ⁻⁴ S cm⁻¹, c^½ = 0.0316 M^1/2

Therefore, Λ_m= (κ/c)

= [(123.7 x 10^-4 Scm^-1)/ (0.001 molL^-1)] x (1000cm³/L)

= [(123.7 Scm²mol⁻¹

Given,

κ = 11.85 × 10⁻² S m⁻¹, c = 0.010M

Then, κ = 11.85 × 10 ⁻⁴ S cm⁻¹, c^½ = 0.1 M^1/2

Therefore, Λ_m= (κ/c)

= [(11.85 x 10-4 S cm^-1)/ (0.010 mol L^-1)] x (1000 cm³/L)

=118.5Scm² mol^-1 Given, κ = 55.53 × 10⁻² S m⁻¹, c = 0.050 M

Then, κ = 55.53 × 10 ⁻⁴ S cm⁻¹, c^1/2 = 0.2236 M^1/2

Therefore, κ = (κ/c)

= [(55.53 x 10^-4 S cm^-1)/ (0.050 mol L^-1)] (1000 cm³/L)

= 111.11 S cm² mol⁻¹ Given, κ = 106.74 × 10⁻² S m⁻¹, c = 0.100 M

Then, κ = 106.74 × 10⁻⁴ S cm⁻¹, c^1/2 = 0.3162 M^1/2

Therefore, Λ_m= (κ/c)

= [(106.74 x10^-4) Scm^-1/ (0.100) mol L^-1]/ [1000 cm³/L)

= 106.74 S cm² mol^-1

Now the following data,

Since the line interrupts Λ_m at 124.0 S cm²mol^-1, Λ_m⁰ =124.0 S cm²mol^-1

Video solution:

Electrochemistry Class 12 Chemistry NCERT Chapter 2 NCERT Solutions

Solving NCERT textbook questions of Electrochemistry Class 12 Chemistry NCERT Chapter 2 is a crucial step to gauge your understanding of the concepts. It provides you with an opportunity to assess your grasp of the material after learning each chapter. We have already provided solutions to all the exercises in the NCERT textbook of Class 12 Chemistry Electrochemistry, available in various formats such as video, text, and downloadable PDFs. If you need assistance with any of the NCERT questions or any other academic topics, feel free to ask in the “Ask Questions” section of LearnoHub.com.

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NCERT solutions of Electrochemistry Class 12 Chemistry - all questions of all exercises are solved. Q. No. 1, 2, 3, and so on. Complete explanation and detailed solution makes them the best videos for Class 12 Chemistry Electrochemistry NCERT solutions.