How to convert electrical conductivity to pH

In summary, electrical conductivity can be converted to pH by using the Nernst equation. This equation takes into account the concentration of hydrogen ions in a solution and the temperature to calculate the pH. By measuring the electrical conductivity and applying the Nernst equation, one can accurately determine the pH of a solution. This method is commonly used in water quality testing and industrial processes.
  • #1
Minh Thanh

Homework Statement


I have some data from measuring EC in solutions and I don't know how to convert EC to pH

Homework Equations

The Attempt at a Solution


I use Arduino for programing. Values of ADC of EC that I collect from microcontroller are 80 ( for EC : 0.2mS/cm ) , 90 ( for EC : 0.5mS/cm), 110 ( for EC 0.7mS/cm) .
 
Physics news on Phys.org
  • #2
The relationship between pH and conductivity is a complex one. Here is an article which may be of assistance.
 
  • Like
Likes NascentOxygen

Related to How to convert electrical conductivity to pH

1. How is electrical conductivity related to pH?

Electrical conductivity is not directly related to pH. While both are measures of a solution's properties, they measure different aspects. Electrical conductivity measures the ability of a solution to conduct electricity, while pH measures the concentration of hydrogen ions in a solution.

2. Can electrical conductivity be converted to pH?

Yes, electrical conductivity can be converted to pH using a mathematical equation. However, this conversion is only valid for certain types of solutions, such as aqueous solutions with known concentrations of specific ions.

3. What is the equation for converting electrical conductivity to pH?

The equation for converting electrical conductivity to pH is: pH = -log(C), where C is the concentration of hydrogen ions in moles per liter (mol/L). This equation assumes a 1:1 relationship between the concentration of hydrogen ions and the electrical conductivity of the solution.

4. Is it necessary to calibrate the equipment before converting electrical conductivity to pH?

Yes, it is important to calibrate the equipment before attempting to convert electrical conductivity to pH. This ensures that the measurements are accurate and reliable. Additionally, different types of equipment may require different calibration procedures, so it is important to follow the manufacturer's instructions.

5. What are the limitations of converting electrical conductivity to pH?

The conversion of electrical conductivity to pH is limited to certain types of solutions and may not be accurate for all types of solutions. Additionally, the conversion assumes a 1:1 relationship between the concentration of hydrogen ions and electrical conductivity, which may not always be the case. Furthermore, the accuracy of the conversion may be affected by factors such as temperature, pressure, and the presence of other ions in the solution.

Similar threads

  • Introductory Physics Homework Help
Replies
1
Views
1K
Replies
5
Views
4K
  • Materials and Chemical Engineering
Replies
0
Views
756
  • Electrical Engineering
Replies
25
Views
3K
  • Engineering and Comp Sci Homework Help
Replies
1
Views
1K
  • Introductory Physics Homework Help
Replies
1
Views
2K
Replies
1
Views
632
  • Engineering and Comp Sci Homework Help
Replies
9
Views
6K
  • Engineering and Comp Sci Homework Help
Replies
4
Views
1K
  • Electrical Engineering
Replies
14
Views
4K
Back
Top