What is the conversion of -75mVsce to Zinc?

What is the conversion of -75mVsce to Zinc?

• A. 955mVzn
• B. 855mVzn
• C. 1025mVzn
• D. 800mVzn

Answer: (A)

To convert a potential measurement in mVsce (standard calomel electrode) to mVzn (Zinc reference electrode), one needs to understand the electrochemical potential difference between these two reference points. The standard potential for the zinc reference electrode is typically about -0.76 V, whereas the standard calomel electrode is at 0.244 V in a saturated solution. The conversion from -75 mVsce to mVzn generally involves adding an offset that corresponds to the difference in these standard potentials. When performing the conversion, you would take the value in mVsce and consider the reference level of the zinc electrode to find the equivalent potential in mVzn. For -75 mVsce, when you apply this offset, the calculation leads to 955 mVzn. Thus, the conversion is achieved by correctly adjusting the potential from one reference to another, resulting in this specified value. Understanding these conversions and how reference electrodes function is critical in corrosion and cathodic protection contexts, as it helps in assessing the corrosion risk and in design considerations for protective systems. Therefore, recognizing the proper methodology and the role of standard electrode potentials is paramount for accurately making these conversions.

To convert a potential measurement in mVsce (standard calomel electrode) to mVzn (Zinc reference electrode), one needs to understand the electrochemical potential difference between these two reference points.

The standard potential for the zinc reference electrode is typically about -0.76 V, whereas the standard calomel electrode is at 0.244 V in a saturated solution. The conversion from -75 mVsce to mVzn generally involves adding an offset that corresponds to the difference in these standard potentials.

When performing the conversion, you would take the value in mVsce and consider the reference level of the zinc electrode to find the equivalent potential in mVzn. For -75 mVsce, when you apply this offset, the calculation leads to 955 mVzn. Thus, the conversion is achieved by correctly adjusting the potential from one reference to another, resulting in this specified value.

Understanding these conversions and how reference electrodes function is critical in corrosion and cathodic protection contexts, as it helps in assessing the corrosion risk and in design considerations for protective systems. Therefore, recognizing the proper methodology and the role of standard electrode potentials is paramount for accurately making these conversions.