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Using henderson-hasselbach to calculate pH

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What is the ph of a 50mM TRIS solution prepared from TRIS acid (157 MW, pKa = 8.3 at 20 degrees C?

Do I use the H-H equation. I was confused on this b/c it does not state how much of the acid or base?

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Solution Summary

In this solution the pH of a 50mM Tris solution is calculated. A useful source for the temperature change of pH in Tris is included, as well as a quick guide to solving the question.

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I realize this is not the answer you're hoping for. As I said before, this problem cannot simply be calculated out. Thus, I found an outside source of information. Here is the link to the information I am ...

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