The electrochemical cell potential is illustrated by the image below. Two essential parameters are needed to calculate electrochemical cell potential: positive cell potential (V2°) and negative cell potential (V1°).
The formula for calculating electrochemical cell potential:
ΔV° = V2° – V1°
Where:
ΔV° = Electrochemical Cell Potential
V2° = Positive Cell Potential
V1° = Negative Cell Potential
Given an example;
Find the electrochemical cell potential when the positive cell potential is 14 and the negative cell potential is 7.
This implies that;
V2° = Positive Cell Potential = 14
V1° = Negative Cell Potential = 7
ΔV° = V2° – V1°
That is, ΔV° = 14 – 7
ΔV° = 7
Therefore, the elecreochemical cell potential is 7 V.
Calculating the Positive Cell Potential when the Electrochemical Cell Potential and the Negative Cell Potential are Given
V2° = ΔV° + V1°
Where:
V2° = Positive Cell Potential
ΔV° = Electrochemical Cell Potential
V1° = Negative Cell Potential
Let’s solve an example;
Find the positive cell potential when the electrochemical cell potential is 20 and the negative cell potential is 14.
This implies that;
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ΔV° = Electrochemical Cell Potential = 20
V1° = Negative Cell Potential = 14
V2° = ΔV° + V1°
Thatis, V2° = 20 + 14
V2° = 34
Therefore, the positive cell potential is 34 V.
Read more:Â How to Calculate and Solve for Electrode Potential | Nernst Equation | Corrosion
Calculating the Negative Cell Potential when the Electrochemical Cell Potential and the Positive Cell Potential are Given
V1° = V2° – ΔV°
Where:
V1° = Negative Cell Potential
ΔV° = Electrochemical Cell Potential
V2° = Positive Cell Potential
Let’s solve an example;
Find the negative cell potential when the electrochemical cell potential is 18 and the positive cell potential is 24.
This implies that;
ΔV° = Electrochemical Cell Potential = 18
V2° = Positive Cell Potential = 24
V1° = V2° – ΔV°
That is, V1° = 24 – 18
V1° = 6
Therefore, the negative cell potential is 6 V.
Read more:Â How to Calculate and Solve for Current Density | Corrosion
How to Calculate Electrochemical Cell Potential Using Nickzom Calculator
Nickzom Calculator – The Calculator Encyclopedia is capable of calculating the electrochemical cell potential.
To get the answer and workings of the electrochemical cell potential using the Nickzom Calculator – The Calculator Encyclopedia. First, you need to obtain the app.
You can get this app via any of these means:
Web – https://www.nickzom.org/calculator-plus
To get access to the professional version via web, you need to register and subscribe to have utter access to all functionalities.
You can also try the demo version via https://www.nickzom.org/calculator
Android (Paid) – https://play.google.com/store/apps/details?id=org.nickzom.nickzomcalculator
Android (Free) – https://play.google.com/store/apps/details?id=com.nickzom.nickzomcalculator
Apple (Paid) – https://itunes.apple.com/us/app/nickzom-calculator/id1331162702?mt=8
Once, you have obtained the calculator encyclopedia app, proceed to the Calculator Map, then click on Materials and Metallurgical under Engineering.
Now, Click on Corrosion under Materials and Metallurgical
Now, Click on Electrochemical Cell Potential under Corrosion
The screenshot below displays the page or activity to enter your values, to get the answer for the electrochemical cell potential according to the respective parameter which is the Positive Cell Potential (V2°) and Negative Cell Potential (V1°).
Now, enter the values appropriately and accordingly for the parameters as required by the Positive Cell Potential (V2°) is 14 and Negative Cell Potential (V1°) is 7.
Finally, Click on Calculate
As you can see from the screenshot above, Nickzom Calculator– The Calculator Encyclopedia solves for the electrochemical cell potential and presents the formula, workings and steps too.
