Question

Describe an experimental method to determine the limiting molar conductivity of a NaOH aqueous solution at 298.15 K.

Answer 1

To determine the limiting molar conductivity of a NaOH aqueous solution, you can use an experimental method called conductivity titration. Here are the steps: prepare a NaOH solution with a known concentration, set up a conductivity meter and a burette, fill the burette with the NaOH solution and slowly add it to a solution of a strong acid, such as HCl, in a conductivity cell, measure the conductivity of the resulting solution as you add the NaOH solution drop by drop, plot a graph of conductivity versus volume of NaOH solution added, and determine the limiting molar conductivity from the point where the conductivity levels off.

Step-by-step explanation:

To determine the limiting molar conductivity of a NaOH aqueous solution, you can use an experimental method called conductivity titration. Here are the steps:

1. Prepare a NaOH solution with a known concentration.
2. Set up a conductivity meter and a burette.
3. Fill the burette with the NaOH solution and slowly add it to a solution of a strong acid, such as HCl, in a conductivity cell.
4. Measure the conductivity of the resulting solution as you add the NaOH solution drop by drop.
5. Plot a graph of conductivity versus volume of NaOH solution added.
6. The limiting molar conductivity of the NaOH solution can be determined from the graph as the point where the conductivity levels off, indicating that all the acid has been neutralized by the base.