Which of the following best describes the purpose of flux on an electrode during a redox reaction?

• A. To prevent the electrode from participating in the reaction
• B. To remove oxide layers and impurities from the electrode surface
• C. To increase the electrical conductivity of the electrode
• D. To act as a catalyst for the redox reaction

Answer: (B)

Verified step by step guidance

1. Understand that in electrochemistry, the electrode surface must be clean and free of contaminants to allow efficient electron transfer during redox reactions.
2. Recognize that oxide layers and impurities can form on the electrode surface, which can hinder the electron flow and reduce the electrode's effectiveness.
3. Know that flux is a chemical agent applied to the electrode surface to remove these oxide layers and impurities by chemically reacting with or dissolving them.
4. Realize that by cleaning the electrode surface, flux ensures better contact between the electrode and the electrolyte, facilitating the redox reaction.
5. Conclude that the primary purpose of flux on an electrode during a redox reaction is to remove oxide layers and impurities from the electrode surface, rather than preventing participation, increasing conductivity, or acting as a catalyst.