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MusicMonkey
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What is the molecular weight of potassium phosphate buffer pH 6.8 and pH 6.4? I tried to find the answer but no luck. Please help calculate. Thank you. 
What is the Molecular Weight of Potassium Phosphate Buffer at pH 6.8 and 6.4?
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Discussion Overview
The discussion centers on the molecular weight of potassium phosphate buffer at specific pH levels (6.8 and 6.4) and the implications of pH on the molecular weight of the buffer components. The scope includes chemical calculations and the properties of buffer solutions.
Discussion Character
- Technical explanation
- Debate/contested
- Mathematical reasoning
Main Points Raised
- One participant inquires about the molecular weight of potassium phosphate buffer at pH 6.8 and 6.4, expressing difficulty in finding the answer.
- Another participant provides a molecular weight of 212.28 for K+ PO3(4-) and questions how molecular weight changes with pH.
- Some participants assert that the molecular weight does not change with pH, while also noting a potential error in the chemical formula provided for potassium phosphate.
- A participant mentions that buffers are mixtures, suggesting that there is no singular molar mass and that molar concentration refers to the total concentration of both acid and conjugate base.
Areas of Agreement / Disagreement
Participants express differing views on whether the molecular weight of the buffer changes with pH. There is no consensus on the implications of pH for the molecular weight or the correct formula for potassium phosphate.
Contextual Notes
There are unresolved assumptions regarding the definitions of molar mass in the context of buffer solutions and the specific chemical formulas being discussed.
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