Discussion Overview
The discussion revolves around converting electric potential readings from an Ag/AgCl reference electrode system to a reversible hydrogen electrode (RHE) system at pH 7. The context is primarily homework-related, focusing on the calculations and assumptions involved in this conversion.
Discussion Character
- Homework-related
- Mathematical reasoning
Main Points Raised
- One participant presents a calculation for converting potentials from Ag/AgCl to RHE, initially stating RHE at pH 7 as 0.4137 V.
- Another participant challenges the calculation, noting that -0.0591 multiplied by 7 does not yield 0.4137 V and suggests inconsistencies in the signs used.
- A subsequent reply corrects the sign for RHE at pH 7 to -0.4137 V, indicating that the initial assumption of the sign was incorrect.
- A question is raised about the value 0.197 V used in the calculations, prompting clarification on its relevance compared to the earlier mentioned 0.222 V.
- The original poster acknowledges the confusion regarding the values, clarifying that 0.222 V is the correct reference for the Ag/AgCl system, while 0.197 V pertains to a different context.
Areas of Agreement / Disagreement
Participants express uncertainty regarding the signs and values used in the calculations, leading to a lack of consensus on the correct approach. There is no clear agreement on the final values or the reasoning behind them.
Contextual Notes
There are unresolved issues regarding the assumptions made about the signs in the calculations and the relevance of the different reference voltages mentioned (0.197 V vs. 0.222 V). The discussion does not clarify the implications of these differences.